User Panel
Posted: 1/31/2011 6:31:35 AM EDT
Trying to start a informational thread that everyone can give details on their 9mm ar's and how reliable they are. Info like what mags, buffers, lpk, bolt ramped or unramped, fire control group's, buffer springs? Stuff like that. Post a pic if you like. If this has already been done please direct me to proper thread and delete this one.
Here is what I'm looking for.. Example DDLES dedicated lower RRA 9mm upper RRA LPK Bill Springfield FCG RRA ramped bolt PWS "Spikes Tactical" ST2 buffer Metalform mags When firing the casing is thrown at the 2-3 oclock position any suggestions? Or is that GTG? No malfunctions unless trying to bump fire, or fire very rapidly Gonna try a different FCG tomorrow and will report back.. |
|
I've got a CMMG dedicated lower and CMMG upper. It runs 100% flawlessly out of the box with Metalform mags. Never a hiccup.
With that said... tag. |
|
I'd like to piggyback onto this one.
I am building my first 9mm. So far, I have Spikes billet upper Spikes 16 inch barrel small parts to complete this upper minus bolt buffer assy with Colt 9mm buffer. The rest of my build plans are: DDLES lower CMMG bolt Metalform mags from CDNN Magpul MOE furniture Magpul MBUS rear sight Tacpoint optic (for now) Need a recommendation on a good LPK for the above setup. I like the stainless LPKs from AIM for 5.56 builds. Any comments or suggestions? |
|
Quoted:
Is this different than the 9mm AR FAQ's thread? Yes sorta.... The FAQ doesn't have what everyones setup listed, it describes parts and parts that have been used. I want to be able to judge for myself what most people use to see what works the best.. Here is what I'm looking for.. Example DDLES dedicated lower RRA 9mm upper RRA LPK Bill Springfield FCG RRA ramped bolt PWS "Spikes Tactical" ST2 buffer Metalform mags No malfunctions unless trying to bump fire, or fire very rapidly Gonna try a different FCG tomorrow and will report back.. |
|
The one main for me was converting to a "colt style" mag adapter (RRA).
And using colt style magazines. I use C-product, and Promag magazines. I can't remember the last time, or even if I've ever had a failure. I'm guessing not. RRA Mag adapter. 10.5" RRA upper. RRA 9MM marked lower (no diff than any other lower) Heavy buffer. Ramped the bolt myself with a dremel. 9MM hammer. |
|
This is my first AR in 9mm. Here's all the specs and everything I used or did to it. I've put shelf ammo, reloads, & hollow points thru it and I've had zero FTF in roughly 1200 rounds now. It eats anything that i've put thru it so far.
Specs: LOWER - Tactical Machining 80% Lower on a Form 1 - SBR - I did all the machining. Ident Marking Services did the engraving, USA Anodizing did the hard coat andizing. Lower has 9mm NATO markings, Safe/Semi markings - DPMS LPK - JP Enterprises Reduced Power Spring kit - Magpul CTR-M Stock, MIAD Grip & Trigger Guard. - KNS Pins. - Hahn Dedicated Mag Block with bolt hold open - Hahn Sub Caliber Buffer - Vltor HK Style Side Sling End Plate - Adjustable Trigger Mod. - Rear Take Down Pin Spring Mod. Upper - Bravo Company Flat Top Upper without ramps. - Gas Tube Plug Mod. (I drilled, tapped, and plugged the gas tube opening in the upper) - RRA Bolt ramped by ADCO. - Green Mountain Custom 8" 3 Lug Heavy Barrel 1/10 twist - HK 3 Lug Flash Suppressor - BCM Gunfighter Mod 4 Charging Handle - YHM Diamond Carbine Length Handguard with endcap. - Troy Industries Handguard Grips. - Troy BUIS - EOTech 552 - LaRue FUG Grip -Metalform 32rd Mags -Beta 9mm Mag http://www.hunt101.com/data/500/medium/9mm_1.jpg http://www.hunt101.com/data/500/medium/9mm_2.jpg |
|
I have two 9mm AR's, both 16" carbines. One carbine length, one mid length. Both run perfectly, no drama.
Boring details: Rifle 1) CMMG Mk 9 lower, RRA barrel on standard AR upper with CMMG factory ramped bolt Rifle 2) Cav Arms Poly lower with RRA MagWell adapter, RRA 9mm hammer and RRA upper Both rifles have 9mm RRA type buffers. Magazine mix: CProducts ProMag Modified Uzi NO Metalforms ever tried as the above function just fine. |
|
Quoted:
Quoted:
Is this different than the 9mm AR FAQ's thread? Yes sorta.... The FAQ doesn't have what everyones setup listed, it describes parts and parts that have been used. I want to be able to judge for myself what most people use to see what works the best.. Here is what I'm looking for.. Example DDLES dedicated lower RRA 9mm upper RRA LPK Bill Springfield FCG RRA ramped bolt PWS "Spikes Tactical" ST2 buffer Metalform mags No malfunctions unless trying to bump fire, or fire very rapidly Gonna try a different FCG tomorrow and will report back.. Are you trying to infer "reliability" based on the popularity of a component or group of components? What is done to get a 9mm AR to run reliably has less to do with the components one chooses and more to do with whether they understand the platform and it's quirks enough to address any issues before they arise and correct any issues that come up unexpectedly... |
|
Quoted:
Quoted:
Quoted:
Is this different than the 9mm AR FAQ's thread? Yes sorta.... The FAQ doesn't have what everyones setup listed, it describes parts and parts that have been used. I want to be able to judge for myself what most people use to see what works the best.. Here is what I'm looking for.. Example DDLES dedicated lower RRA 9mm upper RRA LPK Bill Springfield FCG RRA ramped bolt PWS "Spikes Tactical" ST2 buffer Metalform mags No malfunctions unless trying to bump fire, or fire very rapidly Gonna try a different FCG tomorrow and will report back.. Are you trying to infer "reliability" based on the popularity of a component or group of components? What is done to get a 9mm AR to run reliably has less to do with the components one chooses and more to do with whether they understand the platform and it's quirks enough to address any issues before they arise and correct any issues that come up unexpectedly... While I understand that what works for some, may not work for others. I just want more Ideas on what I can try to get this thing to run more 100% reliable. Statistics don't lie.. I built the above described gun myself and have a very basic understanding how the blowback system works. I have read the FAQ two times and still reading other info on the net as well.. |
|
I have an old school dedicated 9mm Colt AR and don't have any reliability issues. I use CP magazines.
|
|
Oly upper, Sten mags, Sten block. No mods, except for good ammo.
|
|
Mine are all based on Rock River and Hahn precision parts. Original Colt mags and C Products mags have always run 100%
Uzi mag conversions not so much, I have a couple I marked as problematic others are very good. I only use them for range mags though. Don't give up on a rifle until you break it in, all my 9mm ARs ran better after a few hundred rounds and cleaning of course. |
|
Just ordered my DDLES lower, so the biggest decision has been made.
|
|
Quoted:
I have an old school dedicated 9mm Colt AR and don't have any reliability issues. I use CP magazines. Same. Mine never has any trouble. 100% with all 9mm ammo types. Guess I got lucky. |
|
I think there are a lot of 9mm's out there that run fine. We hear more about the ones that screw up so one could get the impression all 9mm's are bad. Its not the case from what I have seen on my own and have read here. Reading this thread makes me think that there are not as many problems with the 9's as some might lead you to believe.
But then, if you own the 9m that is screwed up you probably feel differently about it than I do. Now, when I first put my 9mm together I has some minor feed problems. This was a RRA .223 lower with a RRA conversion mag adapter and a 9mm RRA upper. So, the gun was all RRA. I worked with adjusting the magwell adapter and got it all ironed out however. Since then I put all the parts on a CavArms lower I have and it has been flawless since I built it. As stated before my CMMG Mk9 has always been perfect. No 9mm drama at my house... |
|
|
How to make a 9mm AR run reliably? Start with good parts and assemblies. Take your time putting it together, tweaking as needed for best fit and smoothest function. KNOW HOW THE GUN WORKS and especially the way the magazine interfaces with the rest of the system. Keep it clean.
I have a 16" RRA factory 9mm carbine that required a bit of adjustment of the position of the mag block so it would reliably run CProducts and Rock River supplied modified Uzi magazines. With that small, easy adjustment, it's been like a well maintained sewing machine. I built an SBR with a lower from SOG Armory, barrel from Spikes, upper from PK Firearms, and various and sundry other parts from other reliable vendors. I use the same block that came with the RRA carbine. This also runs wonderfully. And a 10.5" 9mm is a blast to shoot! Caveats: not everyone will be able to make every Colt-style 9mm carbine run with every configuration of magazines and ammo. That's just the way it is. CProducts magazines were supposed to be a "universal" mag for this gun, but while they can generally be made to work with most guns, they just won't work with others. Do not mortgage the farm to buy a container-load of magazines until you've thoroughly tested YOUR gun with several samples of the mag you plan to use-and be ready to change plans if you find some consistent problem that's not a one-off manufacturing defect. And if you can't get the gun to run with both properly modified Uzi magazines and Metalform mags, there is something mechanically wrong with the gun. If you're building one of these guns, plan on taking plenty of time to test and fiddle with it, and work out every kink before you actually put it to serious work. And when it finally does work every time, enjoy! |
|
This is the info I was looking for.. Thanks for the reply's.. I plan on tinkering with it but needed more Ideas on what others have done to theirs..
Also mine is a dedicated lower so there is no adjustment to bring the mag up or down.. |
|
I stopped in to ADCO a few months ago and Steve put one together for me, out of off the shelf RRA components, that runs great.
16" RRA 9mm upper, RRA 5.56 lower, with the conversion block, 9mm hammer, RRA (unmodified) bolt, not sure about the buffer at the moment, I don't remember and don't have the paperwork on me. Takes the modified UZI mags. Second mag I bought had a small defect where it wasn't cut quite enough and the right side of the stack would flip up too much and cause a malfunction. Got that mag replaced. The other mags all worked flawlessly so far. Only about 300 rounds through it so far, but works great. I have noticed more wear on the sliding surfaces of the bolt than I expected this early on (but I'm brand new to AR-15s, so it might be normal). If I lube it any more, it just leaks down and gets into places where I'd prefer it not be. |
|
|
I believe I got mine figured out. I believe mine was the cheap blazer ammo I was using. It ran 3 full mag dumps of Winchester 115 grain.
|
|
I put together my 9mm SBR using the following:
RRA 9mm upper RRA stock bolt (un-ramped) TROS 5" 3-lug bbl. BM carbine lower Hahn 8 oz. buffer RRA 9mm buffer spring DPMS hammer (initially I used an RRA 9mm hammer) KNS anti-rotation pins VM Hy-Tech mag block using unmodified UZI mags DD 7" M4 rail system Troy folding F&R battle sights It runs 100% w/any ammo used however, I use mainly my 147 gr. sub-sonic reloads due to using a Trident-9 suppressor in it. |
|
Quoted:
I believe I got mine figured out. I believe mine was the cheap blazer ammo I was using. It ran 3 full mag dumps of Winchester 115 grain. Cheap aluminum case Blazer or Blazer Brass? I don't think the aluminum case Blazer is "recommended" for use in blowback actions - some people claim it runs fine and others have problems with it. |
|
Quoted:
Quoted:
I believe I got mine figured out. I believe mine was the cheap blazer ammo I was using. It ran 3 full mag dumps of Winchester 115 grain. Cheap aluminum case Blazer or Blazer Brass? I don't think the aluminum case Blazer is "recommended" for use in blowback actions - some people claim it runs fine and others have problems with it. It's the cheap alumnium case. Wish I woulda knew before I bougtlht 1k rounds. Oh well I got a buddy that can use them. |
|
Quoted:
Quoted:
Quoted:
I believe I got mine figured out. I believe mine was the cheap blazer ammo I was using. It ran 3 full mag dumps of Winchester 115 grain. Cheap aluminum case Blazer or Blazer Brass? I don't think the aluminum case Blazer is "recommended" for use in blowback actions - some people claim it runs fine and others have problems with it. It's the cheap alumnium case. Wish I woulda knew before I bougtlht 1k rounds. Oh well I got a buddy that can use them. That ammo works just fine in most handguns - run it through your glock or whatever else you have... |
|
Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!
You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.
AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types.
From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm.
Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more.
Copyright © 1996-2024 AR15.COM LLC. All Rights Reserved.
Any use of this content without express written consent is prohibited.
AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own.