Description
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Bolt Carier Group
Assembled Bold Carrier Group for M16/AR15
Bolt made of Carpenter No. 158 steel
Bolt carrier made of 8620 steel
Magnetic Particle Inspected and marked 'MPI'
Hard chrome lined carrier with phosphate finish
Chrome Lined Gas Key
Shrouded firing pin
Excellent quality
Made in USA
Item # MIBCG
The bolt isn't shot peened or HPT.