Product Questions

What magazine/ammo does BCA recommend for each caliber?
Caliber Magazine Ammo Grain Weight Ammo Brands   BCA Status AR15 - 223/5.56 MagPul PMAG, MFT 55, 69, 75   Sierra   AR15 - ...
Is my BCA BCG staked?
Yes! We have changed to staking BCGs from the side instead of from the top. All BCA BCGs are rated for full auto, this side staking process has proven to increase the longevity of the BCG and hold on the gas keys. If you have further questions, please...
What mag works best for BCA 9mm's?
Check out our AR9 and Genesis Mags here:
What Gen GLOCK do you replacement barrels for GLOCK work with?
Our BCA 19 and 26 barrels for GLOCK work with gen 1 through 5 GLOCK pistols. Our BCA 17, 22, and 23 barrels for GLOCK work with gen 1 through gen 4 pistols (They DO NOT work with gen 5)
What platform pattern are your AR10 Uppers?
Our uppers are made based on the DPMS Gen1 Low Profile model. With the AR10, there are many different designs and models out there, and each company tends to create and design its own unique platform.  For that reason, we cannot guarantee the fitment...
Are your side charging handles reciprocating or non-reciprocating?
They are all reciprocating
What side do your side charging uppers eject?
It depends and should be listed on the item description. Most of them eject right side; however, we do have left side ejecting as well and will always be listed as such.
How do I remove my barrel nut?
Your barrel nut should come off using a wrench and some force. If you are having issues try heating up your barrel nut to loosen any oil that has bonded to the surfaces. If this still does not work send an email to ...
What hex size can be used on my handrail screws?
MLOK Split Rails 9/64 Allen Key MLOK Gen 3 Rails 25 Allen Key or 25 T-Key
What buffer should I use?
Check out our video tutorial.
How should I break in my barrel?
Shoot one round and then clean the barrel. (Do this for the first ten rounds.) Shoot three rounds and then clean the barrel. (Do this for the next fifteen rounds.) Shoot five rounds and then clean the barrel. Shoot a fouler round. Shoot three rounds...
What is the trigger weight on your standard triggers?
We use standard MILSPEC triggers in our lowers and that is a standard trigger pull weight of 7-8 pounds.
Do the 9mm uppers have LRBHO?
What adhesive or threadlock is used to attach the muzzle device to the muzzle?
We do not apply thread lock to our flash hiders/muzzle breaks, they are threaded on. 
Are the .410 Shotgun uppers and rifles able to shoot .45 Long Colt?
No, the barrel is not rifled and will not shoot .45 LC
What is the thread pitch/thread size/muzzle size on your products?
The muzzle tip/threadpitch is listed under each product in the "More Information" section! Here is a full list. Caliber Muzzle TP AR15 - .223/5.56 1/2 x 28 AR15 - .224 Valkyrie 1/2 x 28 AR15 - .300 Blackout 5/8 x 24 ...
How do I get the firing retainer pin inside the carrier?
Here are some tips on how to get the firing retainer pin inside the carrier: Hold the BCG in your hand with the bolt pointing towards the ground. Looking at the retainer pin, one end maybe just ever so slightly longer than the other side. Ensure...
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