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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.
Brand new (60 rounds) AR15 upper 5.56 -Clearing safe sale . Mid length gas - Super flat shooting with a LW BCG
11.5 Faxon Duty Series Gunner
Superlative arms adjustable gas block
Aero melanite gas tube
Aero M4e1 complete upper receiver
Midwest Industries Handguard W/QD
$475
I also have...
AR Parts - All New/unused unless mentioned
$95 - Ballistic Advantage BCG, Nitride (Less than 50 rounds) SOLD
$15 - Lancer 20 Round 5.56 Magazine, Black (NEW) SOLD
$50 - BCM Mod 4 Charging Handle (Less than 50 rounds) SOLD
$70 - Palmetto State BCG, Nitride (NEW)
$15 - Aero Precision...
I'm looking for a radian BCG (with logo) specifically to complete a Model 1 build. I know I could use a different one, but I'd rather it match the rifle. In case anyone has one they're willing to part with. I'm in Bluffton, SC now so will need to pay with venmo, Zelle etc and have it shipped...
Psa ar15. Lower is ar15 multi, with their EPT, enhanced polished trigger. Upper is 16” lightweight mlok with the nickel boron BCG.
Optics/sights and foregrip not included, but I’m willing to add them in for the right price.
I’m open to some trades.
Ruger 10/22 takedown, preferably with...
Moving to a bolt gun Grendel setup so selling my 6.5 Grendel AR-pattern parts. The following is included:
20" Ballistic Advantage Barrel
FAILZERO 6.5 Grendel BCG TYPEII
VG6 Gamma 6.5 Brake
(3) 25-round 6.5 Grendel AR mags
(3) 10-round 6.5 Grendel AR mags
EXACTLY 122rnds thru the barrel, BCG...
Brand new (unfired, except whatever testing the manufacture did) in foam wrapper, 5 inch 9mm AR upper, made by Alpha Shooting Sports. Includes charging handle and BCG (it is *complete*!). Barrel is threaded 1/2x28. You can find more details about the upper here...
Clearing out the safes. PSA 16'' new never mounted on a lower. No BCG or charging handle.
Will travel local for sale
Will ship/Buyer pays actual shipping
$160.00
Hi all, building an AR10 on Aero recievers and can't decide what barrel and BCG to buy. Was looking at aero or BA stainless steel fluted and same bolt. Also read about faxon match fluted. Then saw Rainier Arms Ultramatch MOD2, and read good things about it.
Looking for something light and...
Unmarked chrome lined phosphate bcg, head spacing was checked but otherwise unfired. The cam pin was dimpled and then cold blued. $75 shipped. PayPal or zelle preferred.
I have an Aero Precision 5.56 BCG Black Nitride and Radian Weapons Raptor Ambidextrous Charging Handle available. Selling together. (No trades at this time. Thanks). These were going to be part of a complete Aero upper that didn't work out for my wife. Less than 30 rds, so they are in great...
Lantac side charging upper receiver
Eisenach side charging bolt carrier
Both have been assembled but never fired, in like new condition no issues.
$200
I ordered this bolt carrier group for a build and fired about 50 rounds with it. I decided to go in a different direction with the build. I added a photo of the specs from ardiscounts.com
Possibly opens to trades for small pistol primers, 15” Mlok handguard, quality 556 muzzle brake/comp.
***Entire lot sold pending funds. Will close & lock thread when completed***
3x 5.56 BCGs, new/unfired. $50 each
2x charging handles. $10 each
2x 5.56 carbine buffers & springs. $10 each
2x 9mm buffers & springs. $10 each
1x rifle buffer, spring, and gas tube. $10
1x milspec buffer tube. $10...