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bolt carrier

A bolt is the part of a repeating, breech-loading 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 extractor and firing pin are often integral parts of the bolt.
In gas-operated firearms, the bolt itself is housed within the larger bolt carrier group (BCG), which contains additional parts that receives rearward push from the gas piston.
The slide of a semi-automatic pistol is a form of bolt, as it contains the same parts and serves the same functions.

View More On Wikipedia.org
Recent contents
  1. A

    Colt fn bolt carrier group

      1. For Sale
    • $250
    • downey
    • Other
    selling a old colt c stamped bolt carrier with a fn MPF marked bolt. both show little to no sign of wear as you can see. staking seems to be of the older way from the top instead of the sides. asking $250.00 shipped I accept zelle, venmo or usps money order. thank you.
  2. M

    Aero precision 6.5 bcg

      1. For Sale
    • $150
    • Lakewood
    • Washington
    Brand new never fired 6.5 Grendel/6mm arc bolt carrier group bought to build 6 arc and haven’t got around to it and moved on to something else
  3. Seek3r

    Kak bolt carrier group

      1. For Sale
    • $75
    • Minot
    • Other
    Kak ar15 7.62x39 bcg Had as a backup for my rifle and fired 3 rounds to test function before storing it. Rifle gone now so no longer need. $75 shipped to your door.
  4. huntpotter

    AR-15 Bolt Carrier Group Rock River Arms

      1. For Sale
    • $60
    • Vancouver Ridgefield
    • Washington
    Up for sale, Southwest Washington, Vancouver area, Clark county area. Rock River Arms, complete bolt carrier group. For AR-15 5.56/.223 rifles. Chrome lined carrier and key. Phosphate coated. As new, never fired by me. It came in a complete RRA 10.5" pistol upper, that was test fired at the...
  5. PiratePast40

    Cracked AR Bolt carrier

    I posted this on another forum but thought I should also post it here as a PSA: While cleaning an ar15, noticed that the bolt carrier had a crack on both sides. The crack is just aft of the firing pin retaining pin. It's where there is a slight reduction of diameter on the carrier. This is...
  6. B

    Spikes tactical M16 bolt carrier group Nickle Boron finish

      1. For Sale
    • $135
    • Milwaukie
    • Oregon
    Hot/ MPI Bolt Brand new Beautiful Complete carrier group
  7. Duneblaster

    Cryptic Chrome Lined Bolt Carrier 5.56

      1. For Sale
      2. For Trade
    • $75
    • North Bend
    • Oregon
    New, unused. Features chrome lined bolt carrier, chrome lined gas key, Grade 8 fasteners. Free Shipping Trades: CMMG .22lr 1:16 twist rate barrel (new or used)
  8. huntpotter

    AR-15 Nickel Boron Bolt Carrier Group. And Charging Handle.

      1. For Sale
    • $60
    • Vancouver Ridgefield
    • Washington
    Up for sale, Southwest, Washington, Vancouver area, Clark county area. Toolcraft (Palmetto) premium nickel boron bolt carrier group. .223/5.56, full profile. Used for testing a few uppers. Detail cleaned and stored away. Also includes a PSA used standard charging handle. Selling for $60 cash...
  9. chipotle

    AR-15 components (trigger, grips, etc.), Stripped .308 BCG, Glock 17 barrel, AK goodies: Gas tube & recoil assembly, Saiga 12/Vepr 12 BIG BRAKE

      1. For Sale
    • Vancouver
    • Washington
    In-person cash transactions in East Vancouver area or shipped on the buyers dime w/ NOTE FREE PPFF or Venmo, CashApp payment. 1. AR Pistol/Vert/Handstop Grip Bundle ($50): MOE (w/storage insert), MOE SL, Hogue, MVG Vert MLOK & Phase 5 mini aluminum handstop bundle. Vert grip and handstop...
  10. adam84

    I need a Ak 47 bolt carrier with piston rod. Please let me know if you have an extra one laying around.

      1. Want to Buy
    • Portland
    • Oregon
    I have a KUSA -103 that needs a new bolt carrier with piston rod. I had to modify mine to fit a cmc drop in trigger and it doesn't want to reset the trigger. Let me know if you have one to sell. Thanks
  11. HaynProdigy808

    Noveske Nitride Bolt Carrier Group BCG - 5.56

      1. For Sale
    • $150
    • Oregon City
    • Oregon
    This Noveske Rifleworks 5.56 M16 BCG only has less than 100 rounds through it. It was purchased direct from Noveske. It does show minimal wear from that many rounds. This BCG functions PERFECTLY and the black Nitride provides a super slick surface so clean-up is a breeze and functions with...
  12. OregonDues

    WTB cheap Bolt Carrier Group

      1. For Sale
      2. For Trade
    • Portland
    • Oregon
    If anyone’s got a cheap BCG in their spare parts bin let me know.
  13. T

    Colt LE6920 BCG (Bolt Carrier Group)

      1. For Sale
    • $170
    • Woodburn
    • Oregon
    "New unused" Colt LE6920 BCG. Has "C" stamp on carrier. Has "white paint dot" on bolt. $195.00 No trades at this time. Shipping available. Thanks.
  14. huntpotter

    PSA Toolcraft DLC Coated Bolt Carrier Group AR-15

      1. For Sale
    • $80
    • Vancouver Ridgefield
    • Washington
    Up for sale. SW WA, Vancouver area, Clark County area. Black DLC coated AR-15 5.56 Bolt Carrier Group. 9130 MPI shot peened bolt. Toolcraft brand, purchased from PSA for $169 a couple years ago. Used it for 100 rounds to test an upper, detail cleaned, and put in storage. The DLC coating is very...
  15. Lars

    Aero Pro bolt carrier group 5.56

      1. For Sale
    • $120
    • Forest Grove
    • Oregon
    New in box Aero Pro BCG https://www.aeroprecisionusa.com/ar15-556-pro-series-bolt-carrier-group-black-nitride
  16. Duneblaster

    WMD M16 Bolt Carrier Group Complete

      1. For Sale
    • $150
    • Roseburg
    • Oregon
    Unfired, installed once, like new. Shipping is $8.00. x1 left.
  17. W

    Century Arms MKE AP5 bolt carrier group

      1. For Sale
    • $300
    • Portland
    • Oregon
    Very good condition with low round count. Can be used on AP5, ZF-5 and other clones.
  18. s75n

    E2 Armory (AO Precision) AR/M16 BCG Phosphate/Chrome

      1. For Sale
    • $70
    • Portland
    • Oregon
    New never installed $70 Meet near SE 33rd Powell Blvd https://e2armory.com/product/bolt-carrier-assembly-group-ar-m16-chrome-phosphate-test-fire/
  19. Roadpirate2322

    Radian Bolt Carrier group

      1. For Sale
    • $120
    • Albany
    • Oregon
    Approx 750 rounds fired. $120 ftf in albany $130 shipped
  20. ScottInPDX

    Two 5.56/300BO AR15 BCGs

      1. For Sale
      2. For Trade
    • $130
    • Tualatin
    • Oregon
    I have a couple of AR15 BCGs that can go. #1: Aero Precision No-Logo Nitride, has seen less than 20 rounds. MPI marked bolt. $75 #2: I believe this is a Lead & Steel branded BCG, so probably ToolCraft OEM. No logo, phosphate coated, chrome lined gas key and bolt channel. MPI marked bolt...
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