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5.56 Nitride Angle Cut Bolt Carrier Group with cryo bolt


Product Description

  • Complete M16 bolt carrier group assembly
  • The QPQ nitride/melonite treatment hardends the surface to 70 RC and reduces friction as well as adding corrosion resistance inside and out
  • Superior to chrome lined and parkerized bolt carrier groups
  • MPI tested and marked. 9310 bolt nitride/melonite treated with additional cryo freeze for extra strength
  • Requires very little lubrication and has a very slick surface
  • Corrosion resistance inside and out
  • Side staked gas key with grade 8 fasteners
  • Product Reviews

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    1. Angle cut cryo treated BCG

      Posted by John McKeown on Aug 17th 2015

      I haven't got to test any of the BCG'S i bought as yet, but the product looks very nice for the money! and i have used Spinta barrels before on many builds(i am a class 7 FFL) every build i have yet to have a headspacing problem!! Which to me means a lot, no wasted time nor headache!! So i am very confident that i will be very pleased with these BCG'S!! John McKeown