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Posted: 8/9/2018 7:56:28 PM EDT
[#1]
8.5. I think the min for my omega is 8.
I have a Superlative Arms AGB on a PSA upper. If you go PSA be mindful of the shoulder on the threads. When I put my FH on it was not concentric at first and I had to shim it. I've read comments from others with similar issues. But apart from that it's my favorite rifle right now. It's accurate and quiet. |
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Posted: 8/9/2018 8:52:43 PM EDT
[#2]
Quoted:
I have an Sbr'd lower and a rugged razor suppressor in NFA jail right now. My goal is to build a 300blk home defense gun. If you were in my shoes, what length (and maybe brand) upper would you use? Also, do the JP capture springs have any issue running suppressed 300 out of an sbr? For shits and giggles I may install a binary trigger down the road. I'm in the early stages of this build and just looking for ideas Wrong suppressor installed at time of pic 
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Posted: 8/10/2018 8:28:33 AM EDT
[#3]
I don't use 300bo for home defense but if I did it would be this guy with a Sandman K instead of the Wolverine, and minus the laser and NV
Hoping the K arrives in the next couple days ETA  
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Posted: 8/10/2018 8:32:25 AM EDT
[#4]
8.5" with a Yankee Hill LT can.
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Posted: 8/10/2018 9:15:00 AM EDT
[#5]
My 8.5" 300BO with direct thread Omega 9k is shorter than my 11.5" 556 with FH. For range use I'll put a quieter, longer 30 cal can on it, but for handling it's even shorter than a Sandman K, lighter, and I suspect suppresses just as well (takes the concussion edge off).
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Posted: 8/11/2018 10:17:34 AM EDT
[#6]
I had a 12" barrel chopped to 7". I have another one that is 7.5". I'll probably end up with a Sig Rattler at some point, which has a 5.5" barrel. For home defense, there's really no need for extra velocity (and it's not even than much extra with 300blk). I run an Omega 9K on my 7".
With supers, you're getting all the ballistics you need within the distance you'd need them, so why run a 10.5" barrel and 6" can and end up with a 16" equivalent gun when you can have the combo be about as long as a 10.5" unsuppressed upper? |
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Posted: 8/11/2018 10:43:52 AM EDT
[#7]
My BCM 9" upper and JP capture spring runs like a champ.
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Posted: 8/11/2018 6:12:26 PM EDT
[#8]
7.5" SBR with Sandman-K
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Posted: 8/12/2018 10:58:40 AM EDT
[#9]
8" w/ Dead Air Sandman-K 
10" w/ Sandman-S |
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Posted: 8/16/2018 10:17:44 AM EDT
[#10]
Supers for HD, subs for pew pew pew.
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Posted: 8/17/2018 7:17:50 AM EDT
[#11]
I wanted to go with an 8.5”. I ended up coming across an AAC 9” barrel and gas block in the E.E. It’s a great barrel, but I wouldn’t pay the $424 AAC wants for them. I
I would look at the BA hanson barels. That was what I was going to probably get before I found the AAC. I would stay in the 8-10” range and closer to 8”. There’s not much of an advantage going with anything outside 8-10”. Shorter looses velocity and longer doesn’t have much velocity gain for the length. If you are looking at complete uppers, I have no idea. I have heard that some PSA uppers don’t have enough of a shoulder to index a suppressor mount. Some people have had luck using mounts that index off the face of the barrel, but I don’t have any first hand experience with store bought uppers at all. |
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Posted: 8/31/2018 10:33:59 PM EDT
[#12]
I have barrels in the 8-9" range. If I was going to do it again, I'd think pretty hard about doing 10.5", just for a longer handguard.
Either way, use the 3-prong mount - it's not obnoxious to shoot at all. |
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Posted: 9/8/2018 9:54:21 AM EDT
[#13]
Just got my first 300 sbr upper.
PSA had 7.5" complete uppers on sale at $249 with free shipping. I couldnt resist. I have an old XXX can to screw on the end... so I will see how quiet it is once the S&B subsonics arrive later today.  Attached FileBushnell TRS25 on the way to replace current red dot. |
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Posted: 9/10/2018 12:50:28 PM EDT
[#14]
Delete.
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Posted: 9/15/2018 8:23:44 AM EDT
[#15]
8.3 BA hansen has served me well. Very accurate and pinned gas block.
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Posted: 9/15/2018 12:05:50 PM EDT
[#16]
My only .300 at this time, SIG Rattler. It's currently a pistol, but I've filed the Form 1. I'm going with the SIG SRD762-QD suppressor. I'm only one month in, on both the Form 1 so SBR it, and the Form 4, for the can. I think the 5.5" will be fine for 50M and less.
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Posted: 9/15/2018 1:14:22 PM EDT
[#17]
Not my HD gun but my truck gun. Nevertheless it’s a 9” BCM upper and pistol lower(for now). H2 buffer and Super 42 spring runs great with subs and supers. The O9K is a little on the louder side. I’m currently running the Sandman S and that combo runs great as well. |
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Posted: 9/16/2018 10:00:22 PM EDT
[#18]
Really asking here; absolutely not trying to start contention:
What is gained by SBR'ing a nicely set up pistol with a good brace? A vertical foregrip, yes; but other than that, -what justifies sending an easy to own and transport pistol into the NFA world? Hoping for some good answers, as I get asked this quite often from students in my firearms classes. (Asking this as an NRA Instructor with dozens of form 4's, and a form 1 SBR lower, still sitting in the box over a year after approval, because the braces do everything I need). |
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Posted: 9/16/2018 10:51:43 PM EDT
[#19]
Quote HistoryQuoted:
Really asking here; absolutely not trying to start contention: What is gained by SBR'ing a nicely set up pistol with a good brace? A vertical foregrip, yes; but other than that, -what justifies sending an easy to own and transport pistol into the NFA world? Hoping for some good answers, as I get asked this quite often from students in my firearms classes. (Asking this as an NRA Instructor with dozens of form 4's, and a form 1 SBR lower, still sitting in the box over a year after approval, because the braces do everything I need). ETA: The good braces cost what a stamp does anyway. |
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Posted: 9/17/2018 8:14:25 AM EDT
[#20]
Quote HistoryQuoted: Because I want a rifle stock not a compromise. And Murica ETA: The good braces cost what a stamp does anyway. 
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Posted: 9/17/2018 9:39:12 AM EDT
[#21]
Quote HistoryQuoted:
...and I haven't seen the ATF's opinion of stock usage flip-flop, at least not yet. Even if I don't feel much justification for a SBR now, it's that nagging possibility of the use of braces being "re/re/reinterpreted" -again, that keeps me from canceling the SBR form 1. |
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Posted: 9/17/2018 10:52:46 AM EDT
[#22]
Quote HistoryQuoted: Because I want a rifle stock not a compromise. And Murica ETA: The good braces cost what a stamp does anyway. Not sure about other states, but in WA you cannot have a loaded rifle in a vehicle. So while I love all my SBRs, I have a 5.56 and 300Blk pistol just for the off-chance I want a loaded firearm in that caliber, while in a vehicle |
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Posted: 9/17/2018 1:33:58 PM EDT
[#23]
Quote HistoryQuoted: Get both. Not sure about other states, but in WA you cannot have a loaded rifle in a vehicle. So while I love all my SBRs, I have a 5.56 and 300Blk pistol just for the off-chance I want a loaded firearm in that caliber, while in a vehicle |
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Posted: 9/17/2018 3:48:55 PM EDT
[#24]
Quote HistoryQuoted:
Really asking here; absolutely not trying to start contention: What is gained by SBR'ing a nicely set up pistol with a good brace? A vertical foregrip, yes; but other than that, -what justifies sending an easy to own and transport pistol into the NFA world? Hoping for some good answers, as I get asked this quite often from students in my firearms classes. (Asking this as an NRA Instructor with dozens of form 4's, and a form 1 SBR lower, still sitting in the box over a year after approval, because the braces do everything I need). |
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Posted: 9/18/2018 11:17:44 AM EDT
[#25]
Quote HistoryQuoted: We are in the SBR forum. Both is the correct answer. Agreed this is (and should remain) the SBR forum: It was only because the last two photos posted above were of braced pistols -that I thought it would be on topic to ask the question here. |
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Posted: 9/18/2018 10:42:51 PM EDT
[#26]
Quote HistoryQuoted:
Really asking here; absolutely not trying to start contention: What is gained by SBR'ing a nicely set up pistol with a good brace? A vertical foregrip, yes; but other than that, -what justifies sending an easy to own and transport pistol into the NFA world? Having a lower with no stock/barrel parts limitations is really nice. |
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Posted: 9/19/2018 6:28:54 PM EDT
[#27]
Quoted:
I have an Sbr'd lower and a rugged razor suppressor in NFA jail right now. My goal is to build a 300blk home defense gun. If you were in my shoes, what length (and maybe brand) upper would you use? Also, do the JP capture springs have any issue running suppressed 300 out of an sbr? For shits and giggles I may install a binary trigger down the road. I'm in the early stages of this build and just looking for ideas |
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Posted: 9/21/2018 11:10:13 AM EDT
[#28]
Quote HistoryQuoted: Valid. And it’s AR15.com... get both is always the correct answer! I've never form 1'd though. I don't drive out of state much (Texas is huge) but on occasion I do go to nearby New Mexico so I hear where you guys are coming from on the pistols and transport. |
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Posted: 9/21/2018 12:42:41 PM EDT
[#29]
Quote HistoryQuoted:
Really asking here; absolutely not trying to start contention: What is gained by SBR'ing a nicely set up pistol with a good brace? A vertical foregrip, yes; but other than that, -what justifies sending an easy to own and transport pistol into the NFA world? Hoping for some good answers, as I get asked this quite often from students in my firearms classes. (Asking this as an NRA Instructor with dozens of form 4's, and a form 1 SBR lower, still sitting in the box over a year after approval, because the braces do everything I need).
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Posted: 9/23/2018 2:21:44 AM EDT
[#30]
I only have SBRs, no pistols, but I am planning to build a few for crossing state lines, being a home for extra short uppers, use while waiting for form ones, and use as a truck gun so I won't be out a stamp if it is stolen.
But I still prefer SBRs. Some platforms really need to be SBRed to be more correct, like krinks with the 100 series stocks and MP5/53 clones. Although some of the MP5 braces look nice. If the PSA MP5 clones work out I will get one and leave it as a braced pistol as I already have a a K and full size form oned. As always, get both is the corrected answer. James |
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Posted: 10/7/2018 9:20:38 PM EDT
[#31]
Quote HistoryQuoted:
Just got my first 300 sbr upper. PSA had 7.5" complete uppers on sale at $249 with free shipping. I couldnt resist. I have an old XXX can to screw on the end... so I will see how quiet it is once the S&B subsonics arrive later today. https://www.AR15.Com/media/mediaFiles/7187/20180908_100344-665075.JPG Bushnell TRS25 on the way to replace current red dot. Those PSA barrels don't have much of a shoulder so I'd be careful everything lines up so you don't have a battle strike |
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Posted: 10/7/2018 9:24:13 PM EDT
[#32]
Quote HistoryQuoted:
Really asking here; absolutely not trying to start contention: What is gained by SBR'ing a nicely set up pistol with a good brace? A vertical foregrip, yes; but other than that, -what justifies sending an easy to own and transport pistol into the NFA world? Hoping for some good answers, as I get asked this quite often from students in my firearms classes. (Asking this as an NRA Instructor with dozens of form 4's, and a form 1 SBR lower, still sitting in the box over a year after approval, because the braces do everything I need). 
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Posted: 10/8/2018 10:38:30 AM EDT
[#33]
Quote HistoryQuoted: @Dragracer_Art Those PSA barrels don't have much of a shoulder so I'd be careful everything lines up so you don't have a battle strike
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Posted: 10/17/2018 5:54:07 PM EDT
[#34]
Quote HistoryQuoted:
7.5" SBR with Sandman-K https://s19.postimg.cc/nu38trg2r/807_D7810-1423-4_ED1-918_A-_CF2_BDEF7_EB1_C.jpg |
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Posted: 10/18/2018 12:44:03 PM EDT
[#35]
Quote HistoryQuoted:
8.5" with a Yankee Hill LT can. https://www.AR15.Com/media/mediaFiles/337946/photoude-481943.jpg I want a longer than 7 inch handguard but needs to be big enough diameter to clear the YHM muzzle device and can |
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Posted: 10/23/2018 8:54:25 AM EDT
[#36]
Quote HistoryQuoted: What handguard are you using on this setup? I’m building a similar setup and have a .30 cal YHM phantom can, 8.5 inch stainless barrel from PSA. I want a longer than 7 inch handguard but needs to be big enough diameter to clear the YHM muzzle device and can |
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Posted: 10/23/2018 9:49:59 AM EDT
[#37]
I cant imagine why any company would produce an ~8" 300blk barrel without a sufficient sized/90 degree shoulder for a suppressor.
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Posted: 10/23/2018 5:24:26 PM EDT
[#38]
After shooting many different barrel lengths, I now know why everyone goes with 9" typically.
The Rattler is way too gassy suppressed and the other less than 9" barrels make a flash and loud bang. I would do a 9" BCM or SR30 in 9.5" and use a SandmanK. |
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Posted: 10/26/2018 10:03:09 AM EDT
[#39]
Quote HistoryQuoted: I really hope you're not recommending that to your students It should have read, "Other than being able to use a vertical foregrip on a SBR, what are you...etc." |
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Posted: 10/27/2018 10:53:41 AM EDT
[#40]
Quote HistoryQuoted:
After shooting many different barrel lengths, I now know why everyone goes with 9" typically.. |
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Posted: 10/31/2018 1:00:36 AM EDT
[#41]
Quote HistoryQuoted: How quiet is it with subs? I’m thinking about building one and already have the K. It's not as good as a larger can. It takes the edge off which was my goal for a work rifle. |
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