Coated Bolt Carrier Group

Coated Bolt Carrier Group

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Coated bolt carrier group (full auto version) for AR15, M16, or M4 machined from Mil-Spec 8620 aircraft quality steel with shrouded firing pin and Mil-Spec chrome lined interior. BCG includes the proper chrome lined and heat treated gas key. Gas key is secured to carrier with Grade 8 fasteners and properly staked per Mil-Specs. This ensures a strong staking and proper gas system functioning. The bolt assembly is CNC machined from Mil-Spec Carpenter No. 158® steel and shot peened for increased strength per Mil-Spec; includes tool steel extractor with spring and viton O-ring; firing pin chromed finished with firing pin retaining pin and cam pin.

HPT (High Pressure Tested) and MPI (Magnetic Particle Inspected).

Complete Mil-Spec M-16 Bolt Carrier with Bolt Assembly HPT/MPI Tested:

  • Mil-Spec BCG Machined from 8620 Aircraft Quality Steel and heat treated to 60-61 RC
  • Mil-Spec Chrome Lined Carrier Interior
  • Mil- Spec Chrome Lined Gas Key
  • Key Staked with Grade 8 Screws, per Mil-Spec
  • Mil-Spec Carpenter 158® Bolt w/ Spring and Ejector 
  • Tool Steel Extractor w/ Spring and viton O-ring
  • Mil-Spec Firing Pin w/ Chrome Finish
  • Mil-Spec Cam Pin
  • Full Auto Carrier (Backward compatible with all semi-auto rifles)
  • 5.56 BCG Weight - 11.55 oz.
Calculated at checkout
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    1. Very nice

      Very nice, smooth, and flawless. It came in quicker than expected. You'll get a lot of "ooooooh, what is thats". Just as slick as nib, worth every penny. on 9th Oct 2020

    2. Expectations exceeded

      I got the Gold BCG and my hands hurt from trying to hold onto it. It is super slippery and will slip through your hands if not held tight enough 10/10 may buy another as a gift to a friend. on 8th Oct 2020

    3. Smooth, gold and amazing.

      Perfect fit, runs smooth and cleans extremely easy. on 1st Oct 2020

    4. Great BCG

      I waited for this one to come back into stock. I did a bunch of research on what BCGs are the best. This one is so smooth and it looks great too. Not disappointed with this buy. I also have my buddies looking to get these too for their new builds. on 29th Sep 2020

    5. Perfect

      I've purchased 4 from Cryptic and there great 5 stars on 24th Sep 2020

    6. Excellent BCG - Mystic Black - .223/5.56

      BCG shipped fast and came packaged very well, pre-oiled and ready to go. First day at the range I ran a couple hundred rounds of both brass and steel without a hiccup. Cleanup was as simple as wiping it down with the microfiber cloth they provided. This is an excellent BCG from a top notch company with excellent customer service. I will be ordering from them again for my next build. Thanks Cryptic! on 20th Sep 2020

    7. Good overall experience

      Shipping was fast, product came wrapped very well and pre oiled. Havent gotten to shoot it just yet but it fit perfectly with no issues. The bcg looks like it will be of good quality. on 10th Sep 2020

    8. Mystic black

      Best coating I’ve ever had on a bcg. Great costumer service, got my bolt ordered and delivered quickly. on 4th Sep 2020

    9. Excellent product

      Runs super smooth, cleaning is a snap. on 3rd Sep 2020

    10. Easy like Sunday morning

      very satisfied with entire ordering process. Couldn't be happier. Customer service is amazing. BCG's are great and exactly what I wanted. on 2nd Sep 2020