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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.
I have a PSA 6.5" upper receiver with the following info:
The Upper is used in good condition with about 500 rounds through it
Barrel: 6.5" 4150V Chrome Moly vanadium steel, nitride treated for durability, and chambered in 5.56 with a 1 in 7" twist. Finished off with a PSA 9" M-lok Rail, a low...
I have a new/unfired PSA 7 inch upper receiver with the following features:
Barrel: 7" 4150V Chrome Moly Vanadium steel, nitride coated and chambered in 5.56 NATO with a 1 in 7" twist. The pistol-length gas barrel is finished off with a PSA 6.5" Lightweight M-Lok Rail, a low-profile gas block...
I have a new/unfired PSA 7 inch upper receiver with the following features:
Barrel: 7" 4150V Chrome Moly Vanadium steel, nitride coated and chambered in 5.56 NATO with a 1 in 7" twist. Pistol-length gas barrel is finished off with a PSA 6.5" Lightweight M-Lok Rail, a low profile gas block, and...
Want to have the loudest gun on your block?
For Sale 5.56 complete upper receiver including bolt carrier group, Aero Precision barrel, charging handle and angled foregrip . Comes with a YHM QD muzzle brake that works with their Turbo cans.
$500 $475 $400 NOW $350!! Cash only FTF in...
Good day wonderful Northwest firearms group, I'm looking for a couple BCG's and parts, FYI - looking for parts to finish my builds before Inslee drops his personal agenda on washatonians with his dreams of a California state............ Payment for sale will be with Zelle
CMMG 22LR BCG...
AR15 5.56 .223 300 blackout bolt carrier group.
Works great, about 500 rounds of 300 blackout. Came from a PSA build kit. I just found the money to upgrade. So here you go... a good deal
$55 if you want the original extractor installed.
$70 as is with the JP enhanced exctractor.
10.5" 5.56 upper - PSA - $300 $280
- NEW PICS Pics of BCG and CH
- Multiple pics
- PSA Product page (minus the optic and the front sight difference)
- 200 rds
- 1:7
- pinned gas block done by D. Wilson Mfg.
- extended latch charging handle
- BCG is FDE-ish with PSA logo
- PSA blast can
-...
BCG $145
5 new Mags $ 20ea. - OR - 5 for $90
Everything price $220
Bought as a spare. But, I have very little wear on my original after a couple thousand rounds. So someone else can make use of it.
KAK Industry LR-308 Double Ejector Complete Bolt Carrier Group
SPECIFICATIONS
Bolt Finish ...
Posting this for my bro. He is a member here but is not that active.
Lightly used PSA complete upper minus BCG and CH. Magpul BUIS, 12 inch m-lok handguard, 10.5 inch 5.56 1:7 barrel, with flash can. FTF in SE Portland preferred, but could possibly meet up elsewhere within reason. $250.00
LWRCi DI BCG, Used, Sub 500 Rounds - $200 *SOLD*
Colt BCG's, Used, Unknown Round Count, $100 per
Colt BCG #2 needs new gas rings for its bolt.
Additional photos provided upon request.
Let’s you shoot .22 out of your AR15.
Took it out of the package, and did a test fit. It is unfired. Comes with one, 25 round mag.
$150, cash only. Trying to pay off my other toys.
Meet face to face, nearish to Tualatin.
Selling my lwrc 10.5 Di upper ..
Selling for 700 without ch and bcg or 900 with bcg/ch
Only had like 100 rounds down the pipe
Partial trade to closed emitter pistol red dot
Brand New "unfired" complete Colt Bolt Carrier Group 223/5.56. Upgraded BCG with Fail Zero at time of purchase.
Currently not looking for trades. Thanks!
$185.00
Used but in good condition
Carrier is C marked and the bolt is MPC marked.
$150 meet at Sportsman’s off 185th
Only possible trade/partial trade would be for FDE or Coyote stocks, grips and 1913 foregrips or a Black M-lok foregrip
Looking to sell some parts I no longer need.
Brand new LMT Full auto BCG $180 Sold
Aero A2 Stock, tube and Buffer/spring $80 Sold
Griffin Armament 10.5” Low Pro Rigid Rail with rail shield panels and hand stop. Brand new in original packaging. $120
Willing to Ship USPS or local Meet up...
Like new Vltor MUR slick side upper, Bootleg adjustable BCG and Vltor charging handle. Test fired then disassembled. Some of the best products available and somewhat hard to find. Selling everything under cost at $380.
Preferred meet in Hillsboro area or can ship for members with positive...