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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. djblingbling1

    Bolt Carrier Group Parts (For stripped BC)

      1. Want to Buy
      2. Want to Trade For
    • Keizer
    • Oregon
    I have a stripped AR15 Bolt Carrier....I want to assemble it into a full BCG. Looking for any and all parts to get it fully assembled! I have a lot of parts posted up for trade if you search my classifieds, or can do cash. Located in Keizer/Salem. Pic for attention! Thanks for looking!
  2. Midasknight

    Done  Bravo Company Manufacturing AR-15 Bolt Carrier Group - M16 $169.99

    https://www.primaryarms.com/bravo-company-manufacturing-bolt-carrier-group-bcm-bcg SKU: BCM-BOLT-CARRIER-GROUP-AUTO-MP MPN: BCM-BOLT-CARRIER-GROUP-AUTO-MP
  3. RobMa

    - SOLD - New BCM FA Bolt Carrier Group (5.56) - SOLD -

      1. For Sale
    • $149
    • Seattle
    • Washington
    Sorry, this item has sold New BCM FA Bolt Carrier Group (5.56) $149 shipped, no bs taxes, no shipping charge Please IM me for any questions Cross-posted on NWF I take PayPal friends and family Shipping OK, S/H free No trade requests please. No separate part sales please No face-to-face...
  4. PDXBear

    AR15 CMMG 22 lr conversion kit Bolt Carrier, Cavity Filled Charging Handle, Anti Bounce Parts

      1. For Sale
    • $150
    • PORTLAND
    • Oregon
    This is excellent condition CMMG AR15 Conversion kit with Bolt Carrier, CMMG Cavity Filled Charging Handle and Anti Bounce Forward Assist Parts. It works great drops into Milspec AR15 5.56 upper to shoot cheap 22lr. This part will more than pay for itself after using it. Price is $150...
  5. huntpotter

    APF Armory AR-15 5.56 Nickel Boron BCG Premium Bolt Carrier Group

      1. For Sale
    • $80
    • Vancouver Ridgefield
    • Washington
    Up for sale. Southwest Washington, Vancouver area, Clark County area. Local meet up, or I can ship with PayPal. APF Armory. AR-15 5.56 Bolt Carrier Group. Premium Nickel Boron coated BCG. (Paid $179 from Midway) Shot peened, nickel boron plated, 9310 steel Bolt Nickel boron plated, full auto...
  6. huntpotter

    Rise Armament Premium BCG Nitride, AR-15 Bolt Carrier Group

      1. For Sale
    • $70
    • Vancouver Ridgefield
    • Washington
    Up for sale. Southwest Washington. Vancouver area, Clark County area. Rise Armament AR-15, 5.56/.223, Bolt carrier group. Super slick Black Nitride coat. Premium series. Hand inspected. MPI tested. Easy to clean Nitride Finish Individually MPI tested Bolt: 9310 MPI tested Carrier: 8620 tool...
  7. Cucv

    6.8 spc bolt carrier group

      1. For Sale
    • $99
    • Happy valley
    • Oregon
    I'm selling my toolcraft 6.8 spc bolt carrier group. Located near Happy Valley Oregon. 100 firm no trades. Never used. Brand new.
  8. CoolBreeze808

    Faxon Gen 2 9mm PCC Blowback Full-Mass Bolt Carrier Group, Glock & Colt Compatible, Nitride **Sale Pending

      1. For Sale
    • $80
    • Portland
    • Oregon
    Less than a thousand rounds on it. Price is firm, not interested in trades. Meet by Mall 205 in Portland. Pay via cash, Zelle, PayPal, or CashApp. Thanks for looking!
  9. CoolBreeze808

    Aero Precision AR-15 Bolt Carrier Group 5.56x45mm NATO - Nickel Boron

      1. For Sale
    • $70
    • Portland
    • Oregon
    Had this spare laying around from a complete Aero I had. This has only a couple range trips on it, I’d say around 600 rounds before I got a BCM upper/bcg. Price is firm, not looking for trades at the moment. Meet by Mall 205 in Portland. Pay via cash, Zelle, PayPal, or CashApp. Thanks for...
  10. Tacompton173

    *SPF* Adams Arms Piston Kit with Bolt Carrier, Carbine

      1. For Sale
      2. For Trade
    • $100
    • Sumner
    • Washington
    Adams Arms piston kit with integrated front rail (carbine length gas system) and matching bolt carrier. I think the carrier is DLC coated. It’s really clean. Used but still in good condition. Pick up in Sumner or Puyallup. Will ship for $10. Payments can be made via Venmo, Zelle, Cash App or...
  11. pnwhunter69

    KAC Sandcutter bolt carrier, new in sealed packaging

      1. For Sale
    • $550
    • Molalla
    • Oregon
    KAC Sandcutter Bolt carrier new in sealed packaging-SOLD!!! $550 cash, not interested in any trades. I can meet in Molalla or Oregon city or ship insured for $560
  12. WHO

    BUSHMASTER HEAVY BARREL NIB w Colt AR Upper & Bolt Carrier

      1. For Sale
    • $315
    • Silverton
    • Oregon
    Colt AR 15 upper never assembled Accompanied by never mounted FLUTED Bushmaster Heavy Barrel And Carrier w Bolt which has been minimally fired Bushmaster is 1/9 MINT NIBag Marked B. M. P 5.56. NATO 1/9. HBAR Interesting barrel made in the Old days shiny mint bore and threads Great cap to...
  13. huntpotter

    APF Armory Nickel Boron Bolt Carrier Group AR-15 556 / 223

      1. For Sale
    • $100
    • Vancouver Ridgefield
    • Washington
    Up for sale, Southwest Washington, Vancouver area, Clark County area. APF Armory. Nickel Boron Bolt Carrier Group. For AR-15 5.56 / .223. C158 shot peened bolt. Tool steel extractor. Top of the line. Very smooth and reliable. (I paid $169 from Midway). Test fired 30 rounds. Detail cleaned, and...
  14. HaynProdigy808

    RCA 5.56 Black Nitride M16 Bolt Carrier Group - Noveske Marked

      1. For Sale
    • $175
    • Oregon City
    • Oregon
    This RCA Bolt Carrier Group was used in my Noveske N4 for less than 200 rounds. It is in PERFECT condition. I swapped it out with a different Noveske BCG. It was purchased directly through Noveske. These are no longer in production...so act fast! MSRP: $195.00 Make me an offer!!! From RCA...
  15. RobMa

    - SOLD - BROWNELLS M16 Lightweight Bolt Carrier Group Nitride - SOLD -

      1. For Sale
    • $89
    • Seattle
    • Washington
    Sorry, this item has sold BROWNELLS M16 Lightweight Bolt Carrier Group Nitride Roughly 150 rounds through it, in great shape Shipping extra Crossposted on ARFCOM I take PayPal friends and family/Venmo Shipping OK, S/H No trade requests please. No separate part sales please No face-to-face...
  16. tdemore1743x

    5.56 bolt carrier group (Anderson, PSA)

      1. Want to Buy
    • Olympia
    • Washington
    Looking for a bolt carrier group to finish an upper I have. Please let me know, ready to pay!
  17. eldbillbo

    Spikes Tactical Lightweight Nickel Boron Bolt Carrier Group

      1. For Sale
    • $160
    • Oregon City
    • Oregon
    Slightly used in VG+ condition Some things to note. If you put this in a carbine with a good running gas system it may become over gassed. If you have a under gassed system this may solve that for you. Otherwise this. Should be used with a adjustable gas block to reduce rifle weight and if...
  18. T

    Genuine Colt Bolt Carrier Group "C" Marked HPT/MPI Mil-Spec BCG

      1. For Sale
    • $285
    • Portland
    • Oregon
    Hello, I have two genuine Colt "C" marked bolt carrier groups for sale. These are both new and unused and were originally intended to be for a couple of URG-I's I was going to build but were instead stored. Asking $285 each. Can meet locally to Portland.
  19. Robert96

    Diamondback DB-15 with mods (SOLD)

      1. For Sale
      2. For Trade
    • $800
    • Keizer
    • Oregon
    Rifle is a DB 15 in 5.56, 16" barrel, aftermarket ToolCraft titanium nitrate auto-rated bolt carrier, fostech echo trigger with ambi safety, extended charging handle, Lancer flared Magwell, topped with the hollosun 515c (has lens cap solar panel and kill flash) Paid $500 for the rifle, $120 for...
  20. huntpotter

    Rise Armament Nitride Bolt Carrier Group AR-15 5.56

      1. For Sale
    • $90
    • Vancouver Ridgefield
    • Washington
    Up for sale, Southwest Washington, Vancouver area, Clark county area. Brand new. Never used. Bolt carrier group, for AR-15 5.56/.223. Rise Armament. QPQ Nitride. Full auto profile. High quality, slick BCG. (Paid $179). I was saving this for a build, but never used it. High-strength and...
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