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Lightweight Bolt Carrier Group

Bolt carrier group for AR15, M16, or M4 compatible with semi and full auto versions. Carrier is machined from Mil-Spec 8620 tool steel with shrouded firing pin and Mil-Spec chrome lined interior. BCG includes the Mil-Spec chrome lined and heat treated gas key. Gas key is sealed then secured to carrier with Grade 8 fasteners and properly staked per Mil-Specs. This ensures proper gas system functioning. The bolt assembly is CNC machined from Mil-Spec Carpenter No. 158® steel then shot peened for increased strength per Mil-Spec; includes tool steel extractor with Wolff spring, viton O-ring , black insert; tool steel ejector pin spring; firing pin chromed finished with firing pin retaining pin and cam pin. Total weight completely assembled 8.2oz. HPT (High Pressure Tested) and MPI (Magnetic Particle Inspected).

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

  • Mil-Spec CNC Machined from 8620 Tool Steel case hardened to 58 - 60 rockwell with chrome lined interior
  • Mil- Spec Chrome Lined Gas Key
  • Key Staked with Grade 8 Screws, per Mil-Spec
  • Mil-Spec Carpenter 158® Bolt
  • Mil-Spec Ejector w/ Spring
  • Mil-Spec Extractor w/ Wolff Spring, viton O-ring and insert
  • Mil-Spec Firing Pin w/ Chrome Finish
  • Mil-Spec Cam Pin
  • 5.56 BCG Weight - 8.2oz.
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$315.00
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    1. Another great product

      Replaced a standard weight mystic bronze bcg with the light weight version. Headspace was right on, just lubed and turned the gas down a few clicks and works perfectly. Currently running it in a Mega arms receiver set, Wilson Combat mid length 16” 5.56 barrel, SLR adjustable gas block, jp captured buffer spring and VG6 Epsilon and the rifle has almost no recoil. When compared side by side to my bone stock mil spec AR the results are truly amazing! Could not be happier. I do get the occasional flash from the ejection port, assuming it’s due to the slightly larger and shallower vent holes on the side of the bcg. No a problem though, love the way this makes my gun shoot. Will be installing in a rifle length 18” build once it’s complete. on 10th Dec 2017

    2. So far so good

      Have only put about 100 rounds through with the new black BCG. I have it in a LWRC DI so I get a lot of build up on the bolt and this thing is extremely easy to clean. It’s about 30% light than the BCG I was running previously. The cryptic Lightweight BCG coupled with my Lantac Dragon muzzle brake makes my AR have almost zero felt recoil and my muzzle barely moves when shot. Again, as the title states so far so good, and hoping it stays this way since it was an expensive unit on 26th Nov 2017

    3. Perfect

      Product and customer service exceeds top notch. Great company to deal with. on 20th Sep 2017

    4. Beautiful piece of art

      This BCG is beautiful and well made. I haven’t had a chance to fire it yet but if it performs as well as it looks, I will definitely be using Cryptic products in all my builds. on 13th Sep 2017

    5. Slick and Extremely High Quality

      Really awesome bolt carrier. The extra 3-4 ounces I save compared to the standard is a nice bonus. I'm running an slr titanium adjustable gas block, vltor a5 buffer h2 weight system, and now this lightweight carrier. Might need to tweak around the mass/gas block to find the sweet spot,but I'm hopeful for this product to perform and last long beyond my expectations. on 18th Jul 2017

    6. Amazing as always!

      Slicker than ky. Cleaned up back to new after just using a dry paper towel and the polishing rag after shooting 400 rounds suppressed 300blkout. This makes my 4th cryptic bcg purchase and don't plan on switching anytime soon. on 7th Jul 2017

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