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bolt carrier group
A bolt is the part of a repeating, breechloading firearm that blocks the rear opening (breech) of the barrel chamber while the propellant burns, and moves back and forward to facilitate loading/unloading of cartridges from the magazine. The firing pin and extractor are often integral parts of the bolt. The terms "breechblock" and "bolt" are often used interchangeably or without a clear distinction, though usually, a bolt is a type of breechblock that has a nominally circular cross-section.
In most automatic firearms that use delayed blowback, recoil or gas operation, the bolt itself is housed within the larger bolt carrier group (BCG), which contains additional parts that receives rearward push from a gas tube (direct impingement) or a piston system.
The slide of a self-loading pistol can be considered a bolt carrier, as it contains the same components and serves the same functions.
Ballistic Advantage Upper
150 rounds through it.
Atlas Odin Works Comp/ Brake
BCM Gunfighter Charging Handle
**Brand New BA BCG is not included, but can be purchased w/ the upper**
$400 FTF Cash - Zelle - Venmo
Fun little pistol.
Upper is complete with bcg, ch, and Silencerco ASR flash hider mount. Nothing else pictured is included or for sale at this time. Just the complete upper.
I literally bought it to see if I’d like a MK18. I think you’ll find yourself loving it. Lightweight, balanced and...
For sale is this early colt upper minus the BCG. Some scratches as shown. Pencil barrel and bayonet lug. Not much more I can say, I don't know a whole lot about these things. Price is $350 FTF cash here in Lebanon. Can ship to where it is legal to own this for about $50. Please PM me with...
I’m selling my M16 upper. It just sits in the safe and I’d rather fund another project than keep looking at it.
I’ve put around 300rnds through it flawlessly. It’s as smooth you think and a blast to shoot.
These uppers were contracted by the USCG to replace their M16A1’s back in the 90’s
Selling a few items all items have very little use:
1) Aero precision 556 BCG black nitride-$75
2)VG6 Epsilon 556 muzzle brake. Unused-$40
3) Radian raptor charging handle-$45
4) Armaspec SRS buffer tube spring-$40
Cash only. No trades. Lemme know
- Faxon Firearms Match Series Nitrided 20" Heavy Fluted $275
- Brownells Nitrided 6.5 Grendel / 6mm ARC Complete Bolt Carrier Group $135
40 rounds fired. Replaced with a Proof Carbon that showed up on a backorder.
(Adjustable gas block not for sale)
Aero precision M4E1 reciever with Fail zero bcg, radian Raptor charging ambi charging handle, Timber creek 15 inch enforcer handguard, balistic advantage 20 inch barrel, Epsilon vg 6 brake, aero logo gas block and stainless gas tube. Zero round count. $825. Cash only.
New barrel and bolt. Got a bug to build a pistol and never got around to it.
WILSON COMBAT BARREL, 6.8 SPC II, SBR, 11.3", ROUND, STAINLESS, GLASS BEAD, 1-11
AERO PRECISION .224 Valkyrie/6.8 SPC Bolt Carrier Group, Complete - Black Nitride
Selling a brand new, never installed black nitride Brownells 308AR Bolt Carrier Group. Got it a while back for a project that I never got around to and totally I forgot I had it until today.
Asking $100. Can meet up in Clatskanie or Rainier. Not looking for any trades currently.
Selling off a spare to fund more spare parts.......the irony.......
Unmarked FA BCG, got this some time ago so not sure who the mfg is anymore? Bolt is mark MPI. I will also include (10) Extractor donuts. Unfired but has been racked a few times. $65 ftf in Gresham.