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12/29/2025 7:02:32 AM EDT
[Last Edit: JThompson][Edited]
Reliability seems to be the biggest issue with a .22 AR.
Couldn't seem to find anything considered reliable other than the M&P 15-22.
Saw this for a decent price but the company gets mixed reviews.
Built a few AR-15 uppers but they were all plug and play without issues.
Not sure if the same with the .22 and would like the least frustrating path.


General questions.
If building from scratch, can I simply choose any upper even one like this with a left side charging handle?
If purchasing the M&P 15-22 and want to make it a SBR, will any AR15 handguard and stock work or are these parts all proprietary?
If going with a dedicated upper, can I simply swap between the .22 and 5.56 without changing any buffer tube, buffer or springs?

One important note, I really like the M&P 15-22 mags as they have the little knob making them easier to reload but these are definitely proprietary.
Is going with the custom build or complete upper, any chance to get them working with the M&P mags?
I did find the Walther Hammerli TAC R1 .22 LR 30-Round Magazine which gets good reviews and should work with the standard AR.
This upgraded web site sucks!!!
12/29/2025 8:49:07 AM EDT
[Last Edit: feudist][Edited] [#1]
Tippmann's(the paintball guys) seem to have a big following.

I have an early 15/22 that has been stellar.
12/29/2025 10:09:33 AM EDT
[#2]
Right To Bear is GTG and offers a nice selection of complete 22 uppers

https://www.righttobear.com/upper-receivers-parts/complete-uppers/?_bc_fsnf=1&Caliber=.22LR
12/29/2025 10:22:02 AM EDT
[Last Edit: VASCAR2][Edited] [#3]
Originally Posted By JThompson:
Reliability seems to be the biggest issue with a .22 AR.
Couldn't seem to find anything considered reliable other than the M&P 15-22.
Saw this for a decent price but the company gets mixed reviews.
Built a few AR-15 uppers but they were all plug and play without issues.
Not sure if the same with the .22 and would like the least frustrating path.


General questions.
If building from scratch, can I simply choose any upper even one like this with a left side charging handle?
If purchasing the M&P 15-22 and want to make it a SBR, will any AR15 handguard and stock work or are these parts all proprietary?
If going with a dedicated upper, can I simply swap between the .22 and 5.56 without changing any buffer tube, buffer or springs?

One important note, I really like the M&P 15-22 mags as they have the little knob making them easier to reload but these are definitely proprietary.
Is going with the custom build or complete upper, any chance to get them working with the M&P mags?
I did find the Walther Hammerli TAC R1 .22 LR 30-Round Magazine which gets good reviews and should work with the standard AR.
View Quote



In my experience the current CMMG pattern bolt barrel dedicated uppers are as reliable as any 22 LR semi auto can be.   I have experienced broken firing pins with dedicated uppers and conversion kits but firing pins are a wear item on a CMMG pattern 22 LR bolt and are not expensive.   I had to recently replace a firing pin on an upper I purchased in about 2009 and had fired many tens of thousands of rounds reliably.

There are three currently manufactured pattern 22 LR bolt barrel designs on the market.   The CMMG pattern is a refined bolt from the original Max Atchisson design later produced by Ciener.   Spikes, Target Master and CMMG have sold this pattern bolt where CMMG is still selling the improved version.    Bore Buddy is selling a 22 LR bolt and conversion kit which is a very similar design as the CMMG but also sold under the Colt name and by Global Ordinance.

Nordic and Rock River Arms sell dedicated 22 LR uppers with the same pattern bolt which is similar in concept to the Tactical Solution dedicated upper but is currently off the market.   Bear Creek Arsenal sell a bolt very similar to Nordic/RRA but uses a side charging bolt.

CMMG pattern bolts use a collar that slips over a barrel stub and has a contained recoil spring.  None of the current 22 LR dedicated uppers or conversion kits that uses 5.56/223 barrels require a buffer tube, buffer or spring.    The Nordic, RRA, BCA uppers use a flush face on the end of the barrel where the bolt mates up to the end of the barrel.   The Nordic pattern bolt has the ejector attached to the barrel whereas the CMMG uses guide rails to hold the Bolt/Collar in alignment with a fixed injector in the left side rail.   The CMMG pattern barrel/bolt is different than Nordic pattern and you have to use a CMMG pattern bolt and barrel together.   You have to use a Nordic pattern barrel with a Nordic bolt.    

CMMG pattern barrels and bolts are available from numerous vendors and are the most prolific with more after market support.   The Nordic/RRA pattern bolts barrels are proprietary and not available from any other vendors.   Same for the BCA plus JP has a proprietary dedicated 22 LR upper.   The Chiappa 22 LR upper imported by ATI is similar to the Tactical Solution but proprietary.

The link to the left hand eject upper is not compatible with 22 LR dedicated bolts and barrels.   At one time I think CMMG offered a left hand eject dedicated bolt and barrel but I don’t think there is currently any option for left hand eject 22 LR uppers.


The CMMG pattern bolt/barrel can use the Better Mag Adapter which permits the use of the S&W 15-22 magazines.   There are rimfire specific bolt catches that can be purchased that provide fully functional bolt catch manufactured by Catch 22 and sold by Bore Buddy.

Nordic, RRA, BCA, Tactical Solutions, RRA, JP and Chiappa use the Black Dog Machine/CMMG pattern magazine with a bolt hold open follower.  After firing the last cartridge out of the magazine the follower rises blocking the bolt from closing on an empty chamber.   With a Better Mag Adapter or Catch 22 the CMMG Pattern bolt/barrel can use S&W 15-22 mags or Kriss Vector mags.

The last time I checked I could buy a complete 22 LR upper cheaper from Right to Bear cheaper than I could assemble an upper from a few parts I had and buying the needed 22 LR parts.


There is no right or wrong answer, you can assemble an upper in any configuration or buy a complete upper.  There are forum members who prefer the dedicated 22 LR firearms like the S&W 15-22 or Tippman.
12/29/2025 10:51:57 AM EDT
[Last Edit: VASCAR2][Edited] [#4]
I did some research and CMMG still sell a left side eject 22 LR conversion kit that you can use with a left side eject AR-15 in 5.56/223.   Bore Buddy sell left side eject dedicated 22 LR uppers.


https://cmmg.com/22lr-ar-conversion-kit-bravo-lh-blk


https://borebuddy.com/product/left-handed-ar22-uppers/
12/29/2025 11:01:03 AM EDT
[#5]
When facing this same decision, I went with the M&P 15-22 pistol.

It does have a significant amount of proprietary parts, but I love the light weight.

Gonna SBR it shortly with $0 form 1.
Attached File
12/29/2025 12:18:11 PM EDT
[#6]
Quote History
Originally Posted By JoelK:
When facing this same decision, I went with the M&P 15-22 pistol.

It does have a significant amount of proprietary parts, but I love the light weight.

Gonna SBR it shortly with $0 form 1.
https://www.ar15.com/media/mediaFiles/26867/1000002639_jpg-3684075.JPG
View Quote


Let’s say you want a shorter barrel and shorter hand guard will the M&P accept any aftermarket market .22 AR barrel and hand guard?
This upgraded web site sucks!!!
12/29/2025 12:34:54 PM EDT
[#7]
The reliable M&P 15/22 mags can be used in a regular AR-15 lower with a Catch-22 device either clipped to the mag well or by adding a spacer to the mag.
12/29/2025 1:02:05 PM EDT
[#8]
Quote History
Originally Posted By VASCAR2:
I did some research and CMMG still sell a left side eject 22 LR conversion kit that you can use with a left side eject AR-15 in 5.56/223.   Bore Buddy sell left side eject dedicated 22 LR uppers.


https://cmmg.com/22lr-ar-conversion-kit-bravo-lh-blk


https://borebuddy.com/product/left-handed-ar22-uppers/
View Quote



Left side charging handle but still right side ejection was the objective.
This upgraded web site sucks!!!
12/29/2025 1:04:29 PM EDT
[#9]
Quote History
Originally Posted By pite0007:
Right To Bear is GTG and offers a nice selection of complete 22 uppers

https://www.righttobear.com/upper-receivers-parts/complete-uppers/?_bc_fsnf=1&Caliber=.22LR
View Quote



Will check them out.
Found out they have their own section and biggest complaint is the inability to contact anyone there for questions or issues.
This upgraded web site sucks!!!
12/29/2025 1:43:33 PM EDT
[#10]
I have an old CMMG Quebec A dedicated .22 rifle that has cycled tens of thousands of rounds flawlessly using Black Dog Magazines.  Unfortunately CMMG is awfully proud of their stuff with the price of a dedicated rifle from them nearing $1500.00.  I would probably go to Right to Bear.com and order a complete upper for about $400.00
"Buzzards gotta eat, same as worms" - Josey Wales
12/29/2025 1:50:59 PM EDT
[#11]
I have both a S&W M&P15 .22lr and a CMMG kit w/ 3 mags. Both run w/o a hiccup. The S&W shoots better groups past 25 yrds.
12/29/2025 1:58:41 PM EDT
[#12]
Quote History
Originally Posted By JThompson:


Let's say you want a shorter barrel and shorter hand guard will the M&P accept any aftermarket market .22 AR barrel and hand guard?
View Quote
There are kits out there that let you do that, but if that is the direction you are going I would just build a regular AR22 upper.

I liked the 8 inch barrel length and handguard that comes on the M&P pistol. It works very well with my Cat Ben suppressor.

12/29/2025 2:33:08 PM EDT
[#13]
I use an RTB upper on a PSA lower with Black Dog and CMMG mags. Runs 100%. I had two M&P22 ARs but prefer the dedicated AR.
12/29/2025 2:37:33 PM EDT
[#14]
I have a 16'' Spikes upper from around 2007ish.  Runs like a champ.  Many thousands of rounds through this with primarily bulk Federal ammo.

I recently purchased a 9'' upper from RTB to run suppressed.  Also runs great with cheap bulk Federal, but only 500 or so rounds though it so far.  These currently have a 20% off coupon code on the website so they are really reasonable.
12/29/2025 4:19:49 PM EDT
[#15]
Quote History
Originally Posted By JThompson:



Left side charging handle but still right side ejection was the objective.
View Quote




To my knowledge there are no left side charge right side eject AR-15 22 LR uppers or rifles on the market.    Adding any weight to rimfire semi auto bolt or firearm can contribute to reliability issues.    I’m sure some talented machinist or gun smith could make a left side charge right side eject upper but it would probably be pricey.
12/29/2025 6:34:41 PM EDT
[#16]
Quote History
Originally Posted By VASCAR2:




To my knowledge there are no left side charge right side eject AR-15 22 LR uppers or rifles on the market.    Adding any weight to rimfire semi auto bolt or firearm can contribute to reliability issues.    I’m sure some talented machinist or gun smith could make a left side charge right side eject upper but it would probably be pricey.
View Quote

If building from scratch, I could use a standard ar15 upper if I am understanding correctly.

If so, I was eyeing something like This.
No extra weight added to the bolt.
Just not sure how the .22 bolt is configured to ensure it would work.
This upgraded web site sucks!!!
12/29/2025 7:46:41 PM EDT
[#17]
Quote History
Originally Posted By VASCAR2:  I did some research and CMMG still sell a left side eject 22 LR conversion kit that you can use with a left side eject AR-15 in 5.56/223.   Bore Buddy sell left side eject dedicated 22 LR uppers.

https://cmmg.com/22lr-ar-conversion-kit-bravo-lh-blk

https://borebuddy.com/product/left-handed-ar22-uppers/
View Quote


I made a left-eject upper for my Sinister from a hybrid poly/steel upper, roughing out a left-side ejection port w/ a drill press.  Used the CMMG left-eject adapter from Stag, and an old Carbon-15 barrel I picked up in Claremore just down from the museum.  After a year or so, the chamber adapter cracked, and Stag wouldn't warranty it as they had a one-year warranty.

Picked up a dedicated .22 LR barrel, but the extractor cut & collar were all set up for right-hand ejection.  Had a machinist, but unfortunately he was my now late Father In Law, so the dedicated barrel will end up on an AR-22 for me.
I sell firearms produced by the finest child labor in the world, be it Filipino, Muslim, Mormon, Arizonan, or Texan.
12/29/2025 10:21:34 PM EDT
[#18]
I built my upper from RTB barrel came with the mags and bolt.

Used a PCC upper from Midway and got a couple more Black Dog sonic weld mags. Mil spec charging handle that filled with silicone
Been using Winchester bulk, I have ran a couple k through it it just runs.
I have done the Bore Buddy bolt weight upgrades.
12/30/2025 2:33:29 PM EDT
[#19]
Tippmann is the easy button for a complete rifle or pistol.  aluminum receivers and most parts compatible with ar15 parts (triggers, stock, grip, hand guard)

Magazines are proprietary but better than most others. Reliability is great, and more accurate than my 10/22s
12/30/2025 4:16:46 PM EDT
[Last Edit: heartburn][Edited] [#20]
RTB barrel and bolt kit in whatever length you want and throw that in whatever milspec upper and handguard/rail combo you want. Bore Buddy reliability kit. Toss it on any lower, insert the buffer plug from the reliability kit and have what you want. Be aware that the barrel lengths can be a bit different than AR barrels. I am running the 9" RTB barrel with a 7" handguard. The barrel is measured a bit different from the norm. Edit for correction and to add that the black dog magazines run well and have a version with steel feed lips and the little tab to retract for easy loading.
12/30/2025 4:39:54 PM EDT
[#21]
Seems like shortest barrel is 4.5 inches and will plan to go that route.
This upgraded web site sucks!!!
12/30/2025 10:39:39 PM EDT
[Last Edit: VASCAR2][Edited] [#22]
AR-15 22 LR rimfire barrels sit deeper into the receiver because of the shorter cartridge.    The CMMG pattern barrel sits about 1.5” deeper into the receiver and a 16” barrel looks similar to a 14.5” AR-15 depending on whether you are using a plain muzzle, FH or MB.

My latest dedicated 22 LR AR-15, Right to Bear upper with CMMG SS bolt.



One of my CMMG dedicated 22 LR AR-15’s set up just like my old 5.56 duty rifle.


12/30/2025 10:53:02 PM EDT
[#23]
Quote History
Originally Posted By everready73:
Tippmann is the easy button for a complete rifle or pistol.  aluminum receivers and most parts compatible with ar15 parts (triggers, stock, grip, hand guard)

Magazines are proprietary but better than most others. Reliability is great, and more accurate than my 10/22s
View Quote


Love my Tippmann M4-22, can't say enough good things about it, try one.
I shoot mine suppressed all the time & everyone who tries it loves it.
12/30/2025 10:57:20 PM EDT
[#24]
Can the Tippman be converted to S&W mags w/ the Better Mag Adapter?
I sell firearms produced by the finest child labor in the world, be it Filipino, Muslim, Mormon, Arizonan, or Texan.
12/30/2025 11:03:29 PM EDT
[#25]
I went through this a year ago. Only decided to take a chance building because I somehow ended up with a dedicated stripped .22 uppers (small ejection port). Decided to buy the best and got me a BoreBuddy match grade barrel and bolt group. Had all the lower parts sitting around as well.

One the first outing I was amazed of the accuracy. It did have a few feed issues the first 100 rds, but eats everything now. I think I have about 3K rounds and I continually impressed with it. I slapped a PA 3x prism on it and now shooting at 100 yrds is no longer a challenge. I am glad I decided to build. Mags are cheap as well.
12/30/2025 11:08:51 PM EDT
[Last Edit: BoomBoom][Edited] [#26]
I went through this a year ago. Only decided to take a chance building because I somehow ended up with a dedicated stripped .22 uppers (small ejection port). Decided to buy the best and got me a BoreBuddy match grade barrel and bolt group. Had all the lower parts sitting around as well.

On the first outing I was amazed of the accuracy. It did have a few feed issues the first 100 rds, but eats everything now. I think I have about 3K rounds and I continually impressed with it. I slapped a PA 3x prism on it and now shooting at 100 yrds is no longer a challenge. I am glad I decided to build. Mags are cheap as well.
12/31/2025 6:14:15 AM EDT
[Last Edit: JThompson][Edited] [#27]
Good info, thanks.
Interesting that "Build from scratch" is in the lead over buying an upper.
Is the reliability that much different or simply that its nice building it oneself?
This upgraded web site sucks!!!
12/31/2025 8:12:27 AM EDT
[Last Edit: ducati650][Edited] [#28]
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I have purchased a couple of dedicated 22rf 16" M4 profile barrels and 22rf conversions from Right to Bear and had John Thomas cut them to mimic my 5.56mm 10.3" barrel length and profile between the gas block step and muzzle. I built 22rf SBRs to mirror my Mk18 and 10.3" USGI AR15s. With these barrels and 22rf conversion assemblies, the rest of the parts were standard AR15 parts.  I added gas blocks and tubes to complete the "look" even though they are not needed. I tuned the actions with Bore Buddy parts and they run flawlessly.

I use them with the SBR lowers from my Mk18 and URGI. The feel, weight, controls and ergonomics are almost identical to the 5.56 units, and this lets me accomplish some of my practice for pennies a shot.
12/31/2025 8:33:32 AM EDT
[#29]
Quote History
Originally Posted By VASCAR2:
There is no right or wrong answer
View Quote
I agree. When I was debating the same thing, I opted for the Tippmann because I've just read too many threads about guns with dedicated uppers or conversions not running 100% and the M&P15-22 just seems cheesy/cheap to me. At the time, I had just given up on a tactical 10/22 pistol/Binary trigger gun that I couldn't get to run reliably so I wanted an "easy button" for this one

Not stock but overall, this thing has been very reliable and a great shooter...


That said, I have been seriously considering building a dedicated 22 upper for a standard lower because I'm getting into a consolidate/minimize mode and have a spare SBR lower that I'm not really using so I thinking about building a dedicated 22 upper for it and assuming it runs, selling the Tippmann. The other motivation here is I'd like to run it with an FRT trigger?
On going to war over religion: "You're basically killing each other to see who's got the better imaginary friend." - Richard Jeni
12/31/2025 11:31:32 AM EDT
[#30]
Quote History
Originally Posted By backbencher:
Can the Tippman be converted to S&W mags w/ the Better Mag Adapter?
View Quote




The Tippman Arms AR-15 pattern 22 LR uses proprietary magazines.   The Tippman magazines provide a fully functional bolt catch so there is no need for a Better Mag Adapter and S&W 15-22 magazines.

The Tippman Arms and S&W 15-22 will always be 22 LR semi autos designed to look and function like AR-15’s.

With a dedicated AR-15 the lower receiver is an AR-15 and can be mated to any upper and will always be an AR-15.



https://tippmannarms.com/shop-all/accessories/m4-22-magazines/
12/31/2025 12:12:08 PM EDT
[#31]
Is there one mag loader that works with these various mags or does each manufacturer required a different mag loader?
This upgraded web site sucks!!!
12/31/2025 2:02:11 PM EDT
[Last Edit: heartburn][Edited] [#32]
Building yourself is the direction I went and the direction I suggest to get exactly what you want. I wanted something that was basically a clone of my HD gun. Scratch build will give you the ability to build out a clone of an HD or training rifle. Gives the ability to setup with same weapon light and switch system, handguard, length, foregrips, optics and any other specifics of your training rifle or SBR and utilize the same lower for a close representation. Much like the great clones Ducati above built.

I believe the McFadden lightning loader has adapters to work with most of the AR22 mags, I do not own one and have not used it to confirm but I do believe it works with the black dog machine mags.
12/31/2025 2:02:19 PM EDT
[#33]
I had a 15/22 and loved it. Won another .22 can at a match and wanted SBR the 15/22 to turn it into something really cool. Between chopping and threading the barrel and getting a new handguard to turn it into what I wanted…I sold it to a buddy and bought a Borebuddy upper and used a Boonie Packer insert in a regular lower I had laying around so I could use 15/22 magazines. I only have a brick and some threw it so far but it’s as reliable as the 15/22 and not a plastic lower.
12/31/2025 2:31:48 PM EDT
[#34]
Seems like the M&P 15-22 is the least desirable way to go.
This upgraded web site sucks!!!
12/31/2025 2:36:16 PM EDT
[#35]
The 15/22 is a super easy solution for someone who just wants to buy something and go shoot it as is, they run.
12/31/2025 2:46:14 PM EDT
[#36]
Quote History
Originally Posted By JThompson: Seems like the M&P 15-22 is the least desirable way to go.
View Quote


Best magazines, works out of the gate, think it will take a standard upper, but plastic lower w/ fixed plastic dummy buffer tube.

Tippman is a few $ cheaper at wholesale.
I sell firearms produced by the finest child labor in the world, be it Filipino, Muslim, Mormon, Arizonan, or Texan.
12/31/2025 3:13:51 PM EDT
[#37]
Did some searching.....
Tippmann doesn't seem to have 3,4,5 inch barrels which means a bit more cost for cutting/threading and new handguard.

BoreBuddy has this nice item.
But would have to buy the shorter handguard for $80.
Price is : $417.53
But then there is the option to add bolt weight. Is it needed? That is an extra $100.
Only 1 mag for this item which seems to have a knob to help when loading : Mag with Knob


With discount the RTB upper is $300.

BB seems to gets really good review but so does RTB (as a budget friendly option)
This upgraded web site sucks!!!
12/31/2025 5:12:40 PM EDT
[#38]
I have four dedicated uppers that use CMMG pattern bolts with 16” barrels and I never saw a need for a BB bolt weight kit.   If you are running a suppressor or an FRT the bolt weight can help to reduce the sound signature and help prevent bolt bounce.
12/31/2025 5:58:00 PM EDT
[#39]
Quote History
Originally Posted By JThompson:
Did some searching.....
Tippmann doesn't seem to have 3,4,5 inch barrels which means a bit more cost for cutting/threading and new handguard.

BoreBuddy has this nice item.
But would have to buy the shorter handguard for $80.
Price is : $417.53
But then there is the option to add bolt weight. Is it needed? That is an extra $100.
Only 1 mag for this item which seems to have a knob to help when loading : Mag with Knob


With discount the RTB upper is $300.

BB seems to gets really good review but so does RTB (as a budget friendly option)
View Quote


I have the bolt weight in mine with aluminum inserts.  It came with 3, aluminum, steel and tungsten. It shoots 40 gr HV ammo of half a dozen brands I have tried, and it is 100% reliable. If I I remove the weight, it is 100% reliable with any standard velocity round I feed it.
1/1/2026 7:50:08 AM EDT
[#40]
Quote History
Originally Posted By JThompson:
Reliability seems to be the biggest issue with a .22 AR.
View Quote View All Quotes
View All Quotes
Quote History
Originally Posted By JThompson:
Reliability seems to be the biggest issue with a .22 AR.


Originally Posted By VASCAR2:
In my experience the current CMMG pattern bolt barrel dedicated uppers are as reliable as any 22 LR semi auto can be.  


Mine as well.

I believe the sentiment that ARs in 22lr are unreliable came from Ceiner/CMMG conversion kits that used a floating insert in a centerfire barrel.

With the very good barrels available for dedicated 22lr ARs, very nice accuracy is also easy to get.

Originally Posted By VASCAR2:
I have four dedicated uppers that use CMMG pattern bolts with 16” barrels and I never saw a need for a BB bolt weight kit.   If you are running a suppressor or an FRT the bolt weight can help to reduce the sound signature and help prevent bolt bounce.


Excess bolt velocity can be a problem for S&W 15-22 magazines and the bolt catch mechanisms that restore last round bolt hold open.  I don't believe bolt speed is a problem for the CMMG pattern magazines that have the follower of an empty magazine interfere with the bolt.

Originally Posted By VASCAR2:
The Tippmann Arms AR-15 pattern 22 LR uses proprietary magazines.   The Tippman magazines provide a fully functional bolt catch so there is no need for a Better Mag Adapter and S&W 15-22 magazines.

The Tippmann Arms and S&W 15-22 will always be 22 LR semi autos designed to look and function like AR-15’s.

With a dedicated AR-15 the lower receiver is an AR-15 and can be mated to any upper and will always be an AR-15.


Indeed.

There may be no wrong answers, but each option will have different limits.  Neither a Tippman nor a S&W 15-22 is an AR15, so they won't be entirely compatible the the staggeringly large AR aftermarket.  They also won't be supported by the growing CMMG pattern market, a big slice of which is available on RTB Arms' and Borebuddy's websites.

I find the way a Tippmann operates very smart and I've read many reports of very good accuracy from their owners.  I wonder whether CMMG would have become the dominant pattern if Tippmann had been making its rifles 15 years ago, but CMMG is the VHS of 22lr ARs.

The S&W has a great reputation for reliability and I have a dozen of their magazines, which are excellent.  S&Ws also have a polymer upper receiver; that's going to introduce flex between an optic and barrel that is not consistent with good accuracy.  Some of us will remember Bushmaster's Carbon 15 that tried to make that work.

The patents on S&W's magazines should be up next year iirc.  I believe the aftermarket may offer some options at that point.
1/1/2026 8:51:55 AM EDT
[Last Edit: JThompson][Edited] [#41]
Quote History
Originally Posted By VASCAR2:
  If you are running a suppressor or an FRT the bolt weight can help to reduce the sound signature and help prevent bolt bounce.
View Quote


No FRT (thanks florida ) but most definitely a suppressor.
This upgraded web site sucks!!!
1/1/2026 10:10:57 AM EDT
[#42]
Quote History
Originally Posted By JThompson:
Tippmann doesn't seem to have 3,4,5 inch barrels which means a bit more cost for cutting/threading and new handguard.
View Quote

One of the things I like about the Tippmann was the 7" barrel option which CMMG, RTB, etc. don't offer. BB does but only in their budget line.

Personally I wouldn't go any shorter. 5" or shorter barrels on a 22LR upper tend to be more finicky and require more tuning and for what, so you can have unusable short handguards?
On going to war over religion: "You're basically killing each other to see who's got the better imaginary friend." - Richard Jeni
1/1/2026 11:20:41 AM EDT
[#43]
I used standard AR15 receivers so I could rebuild into a center fire if I want later. Used a CMMG bcg kit, CMMG AR22 charging handle, Redi-Mag adapter for MP15-22 mags, and a Bore Buddy pressure plug in the buffer. It's more reliable than my 10/22, the only issue has been a broken firing pin so I replaced it with a Bore Buddy premium. It's a 4.5" barrel, I think it's from RTB. One is if you ever want to run a SS or FRT the 4.5" is the hardest to tune proper.




1/1/2026 1:10:23 PM EDT
[#44]
The one main advantage of the 4.5” AR-15 22 LR barrel is it will keep high velocity rated bulk pack 22 LR subsonic.    The ability to use a side folding stock/brace makes a very compact package with a 4.5” barrel and a rimfire suppressor.    The 9” barrel will provide more rail space on the longer hand guard but depending on temperature and ammunition you might need subsonic ammo to keep from getting the supersonic crack.
1/1/2026 2:04:27 PM EDT
[Last Edit: zukiphile][Edited] [#45]
Quote History
Originally Posted By airgunner:

One of the things I like about the Tippmann was the 7" barrel option which CMMG, RTB, etc. don't offer. BB does but only in their budget line.
View Quote


This outfit has a 7.5 inch barrel in the CMMG format catalogued but currently out of stock.  https://www.ghostrifles.com/grid-defense-7-5-22lr-1-16-twist-barrel/

I am not recommending Bear Creek, but for their format they have a very cheap 7.5 inch rimfire barrel.
1/1/2026 2:24:00 PM EDT
[#46]
For me I was picky about the hand guard and upper.  The BCM hand guard was a requirement. After checking out the SW 15/22 and the Tippman I didn’t care for them. I am sure they are good, but I had my preference. Reliability was a big concern of mine as well.

After completing my build (with a lot of advice here), on the first range trip, all my reliability concern pretty much was a non issue. Someone had mentioned that their build was more reliability than their 10/22 and I can confirm this as I have a 10/22 as well.

I say build, but use high quality parts. If you are using parts and barrels from BoreBuddy, I can confirm that you’re not going to have issues and you’ll be happy with the accuracy.  

1/10/2026 1:57:18 PM EDT
[#47]
Quote History
Originally Posted By VASCAR2:



In my experience the current CMMG pattern bolt barrel dedicated uppers are as reliable as any 22 LR semi auto can be.   I have experienced broken firing pins with dedicated uppers and conversion kits but firing pins are a wear item on a CMMG pattern 22 LR bolt and are not expensive.   I had to recently replace a firing pin on an upper I purchased in about 2009 and had fired many tens of thousands of rounds reliably.

There are three currently manufactured pattern 22 LR bolt barrel designs on the market.   The CMMG pattern is a refined bolt from the original Max Atchisson design later produced by Ciener.   Spikes, Target Master and CMMG have sold this pattern bolt where CMMG is still selling the improved version.    Bore Buddy is selling a 22 LR bolt and conversion kit which is a very similar design as the CMMG but also sold under the Colt name and by Global Ordinance.

Nordic and Rock River Arms sell dedicated 22 LR uppers with the same pattern bolt which is similar in concept to the Tactical Solution dedicated upper but is currently off the market.   Bear Creek Arsenal sell a bolt very similar to Nordic/RRA but uses a side charging bolt.

CMMG pattern bolts use a collar that slips over a barrel stub and has a contained recoil spring.  None of the current 22 LR dedicated uppers or conversion kits that uses 5.56/223 barrels require a buffer tube, buffer or spring.    The Nordic, RRA, BCA uppers use a flush face on the end of the barrel where the bolt mates up to the end of the barrel.   The Nordic pattern bolt has the ejector attached to the barrel whereas the CMMG uses guide rails to hold the Bolt/Collar in alignment with a fixed injector in the left side rail.   The CMMG pattern barrel/bolt is different than Nordic pattern and you have to use a CMMG pattern bolt and barrel together.   You have to use a Nordic pattern barrel with a Nordic bolt.    

CMMG pattern barrels and bolts are available from numerous vendors and are the most prolific with more after market support.   The Nordic/RRA pattern bolts barrels are proprietary and not available from any other vendors.   Same for the BCA plus JP has a proprietary dedicated 22 LR upper.   The Chiappa 22 LR upper imported by ATI is similar to the Tactical Solution but proprietary.

The link to the left hand eject upper is not compatible with 22 LR dedicated bolts and barrels.   At one time I think CMMG offered a left hand eject dedicated bolt and barrel but I don’t think there is currently any option for left hand eject 22 LR uppers.


The CMMG pattern bolt/barrel can use the Better Mag Adapter which permits the use of the S&W 15-22 magazines.   There are rimfire specific bolt catches that can be purchased that provide fully functional bolt catch manufactured by Catch 22 and sold by Bore Buddy.

Nordic, RRA, BCA, Tactical Solutions, RRA, JP and Chiappa use the Black Dog Machine/CMMG pattern magazine with a bolt hold open follower.  After firing the last cartridge out of the magazine the follower rises blocking the bolt from closing on an empty chamber.   With a Better Mag Adapter or Catch 22 the CMMG Pattern bolt/barrel can use S&W 15-22 mags or Kriss Vector mags.

The last time I checked I could buy a complete 22 LR upper cheaper from Right to Bear cheaper than I could assemble an upper from a few parts I had and buying the needed 22 LR parts.


There is no right or wrong answer, you can assemble an upper in any configuration or buy a complete upper.  There are forum members who prefer the dedicated 22 LR firearms like the S&W 15-22 or Tippman.
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I put around 40k rounds through CMMG type AR22 builds in Steel Challenge. They’re alright but for reliability I’d go for Tippman or M&P-15/22. I went with the later and they’re trouble free as long as you replace the magazines when the feedlips spread.
Point shooting will give you monkeypox. - John_Wayne777

The Emu War could have been won if the Australians used red dots on their handguns.
1/10/2026 1:59:17 PM EDT
[#48]
Quote History
Originally Posted By Stetson1:

https://media0.giphy.com/media/26FLgGTPUDH6UGAbm/200.webp?cid=8dc8958ccgno18hop1rvcmrv39z6nrfkahpn95b7cbfb90yk&ep=v1_gifs_search&rid=200.webp&ct=g
Love my Tippmann M4-22, can't say enough good things about it, try one.
I shoot mine suppressed all the time & everyone who tries it loves it.
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I’ve never met anyone with a Tippman who regretted the purchase. They’re awesome.
Point shooting will give you monkeypox. - John_Wayne777

The Emu War could have been won if the Australians used red dots on their handguns.
1/12/2026 9:43:08 AM EDT
[Last Edit: Erik72][Edited] [#49]
I think I saw above you were interested in a Lefthanded upper.  Borebuddy offers a LH bolt....and complete upper.  https://borebuddy.com/product/left-handed-borebuddy-modular-22lr-conversion-bolt-only/

This link shows a conversion bolt with the 223 chamber adapter.  However, they are offered for dedicated barrels as well.

I have a 4.5" borebuddy barreled upper (RH) and it feeds everything I put in it...high velocity that is.  It will not reset the trigger shooting CCI Std Velocity because the barrel is so short it doesn't have time to build the needed backpressure.  As mentioned, it will shoot and cycle EXTREMELY reliably with CCI Mini Mags or ARtactical (1235fps and 1200 fps respectively) and keep them subsonic if you're shooting suppressed.  Shooting the 4.5" is fun but if you're serious about downrange accuracy, I'd recommend at least a 12" barrel.  If all you're doing is hitting steel out to 50yds, then the 4.5" is perfect.

I prefer the S&W magazines with the magwell spacer and catch22 bolt hold open but the Black Dog Mags are pretty much the  standard for these.  I have poor experience with CMMG branded magazines.  The KRISS mags work and feed great but the springs are a little weak to push up the bolt hold open.

I see the complete Apogee upper shows the shortest barrel length is 7".  I'm pretty sure he still offers the 4.5" but favors the 7" becuase it will cycle the Std Velocity.  Give him a call, he'll be glad to discuss all this with you.
1/12/2026 12:30:53 PM EDT
[Last Edit: JThompson][Edited] [#50]
Quote History
Originally Posted By Erik72:
I think I saw above you were interested in a Lefthanded upper.  
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Definitely not interested in a left handed upper.
Just wanted the charging handle on the left side of the receiver.
Have 2 builds with it and so much better than the usual charging handle.
No one has them in stock anymore.
TBD

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