- This is a M16 profile, full mass bolt carrier group that has several key components coated with the EXO Nickel Boron Technology. The bolt carrier is compatible with most Mil-Spec AR-15/M16/M4 upper receivers and will simply drop in to replace your existing BCG.
- The EXO NiB coating provides you with permanent dry lubricity, significantly increased durability, as well as increased corrosion and wear resistance. This EXO coating technology has been proven the SWAT team, tactical trainers, as well as the US Department of Defense.
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