Precision Defense 5.56 Complete M16 Bolt Carrier Group - Nitride
- Compatible with 5.56/.223/.300 BLK
- Salt Bath Nitride finish
- 8620 steel carrier with M16 profile
- 9310 steel bolt face
- Magnetic particle inspected
- S7 tool steel extractor
- Billet gas key with staked screws
- 4340 cam pin
- Stainless firing pin
Ratings & Reviews
by Phil -
Kind of a turd... machine marks all over it and I mean ALL over it. I took a gamble and lost. Very rough machining. I'm going to send a few rounds with it and see how it does.
Precision defense bcg
Very nice bcg. Machining is great & the nitride treatment is way better than standard phosphate. Would highly recommend especially for the price
by RICHARD -
Picked this BCG up for a budget build I did for a buddy of mine! Fit and finish is ok! Gas key was well staked and despite the somewhat rough tool marks it cycled flawlessly and had zero issues after 200 rounds! I would recommend for budget builds for plinking or as a backup BCG! Reliability will be determined after extended use!
by terrance -
Bought on labor day sale,recieved today. Does not even slide into my upper reciever tried to force a bit and removed, found scratches down both sides of reciever where i tried to install. Dont waste your time or money, has to be out of spec. Never seen this before.
Can't Go Wrong 300BLK or 5.56
by SouthTXGunner23 -
*PLEASE FIX TO MAKE THIS 5-STAR PLEASE*<br>Picked this up while looking for a spare BCG, caught it on sale for 55, and couldn't be happier with it. It has a nice, solid and smooth nitride job, staked better than some $100+ BCG's which was a surprise. Decided to run it and ended up completing a friend's 300BLK build with it. Has seen and ran smoothly with all types of ammo, 300+ rounds flawlessly so far and can't see that changing any time soon. As always, PA delivers quality for less, thanks for yet another flawless transaction!!! BTW, only 4 Stars because it wouldn't allow me to select 5 Stars, which this product deserves all 5 Stars and then some!!!
Great for the price
by Daniel -
A ok. Not chrome lined but that’s ok for the price
Happy so far
by Adam -
Ran smooth. This was only around 50 rounds but no issues. Smooth surfaces/finish, no complaints this far. Primary Arms is my first stop when looking for anything.
by Deon -
Great quality and finish, especially for the price. Haven’t put but a few rounds through it but I cant see a reason why this thing won’t last thousands of more rounds than what I’ll ever put through it. Great bolt especially for someone with several ar15’s this makes for a great spare.
Get what you pay for...
by Jason -
Spend the extra for a GOOD bolt. It will not run in my new ML AR and I swap out to any other bolt I have and it runs like a top. I it short strokes every time and I even had the range gunsmith check it out and he concurs that it's just a POS. Only reason for 2 stars is that I may have just got a bad one and the fact that it does run in my slightly over gassed CL AR.
by Joseph -
Great BCG for the money!