M16 AR-15 Fail Zero Nickel Boron Bolt Carrier Group
Fits the 5.56 .223 300 blackout 
 AR bolt carrier groups are 100% mil-spec, fully assembled and ready to be dropped in.
Comes In Full Retail Packaging !!
Newest Evolved Model Better Than Ever
M16 Carrier Configuration works in all full and semi auto guns !!
These are NOT Cheap Finished Boron Carriers These Are some of the Highest Quality Finished Carriers On the Planet The finish it super durable and smooth both ultra hard and when cocking the gun giving it that glass feel the finish is one of the best nickel boron finishes on the market when you hold it you can feel how smooth it is.
Our Bolt Carriers Carry
a lifetime warranty Against defects in finish and failure**
SlabSide is a new carrier design change that looks cool and also reduces the amount of air pushing on the back of the carrier when the rifle is shot letting the air go past increasing the cyclic rate reducing weight and also aids in over the beach weapon survivability in water firing operations.
M16 configuration carrier legal for use in any AR-15 and will enhance the guns function from the proper weight that AR's need to cycle 
Smooth Nickel boron finish. 
Fail Zero optimum Bolt Carrier was crafted for the traditionalist individual who wants a A lot more performance than a out-of-the-box, run of the mill phosphate carrier. Our Standard Mil-Grade Carriers are crafted from finest heat treated 8620 material. Featuring full forward assist teeth, M-16 cut and traditional profile. The Bolt is a .223/5.56 Carpenter 158 heat treated steel and MPI Certified. Included are the Mil-Grade Gas Key, Cam Pin, Firing .
The Cam Pin is Boron coated 
Firing pin,cam pin and should be replaced every 10,000 rounds for optimum performance
Part Number: 4324

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Nice !

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