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Each of our Mil-Spec Bolt Carrier Group Assemblies is made in the U.S.A. and feature full-auto capab..
HMB Bolt by HM Defense is made in the U.S.A. and the HMB is 100% compatible with Mil-Spec M16 & ..
Specifications:
Length: 4"
.40
S&W Caliber
1:16 Twist
5/8x24"
Thread Pitch
4150..
Specifications:
Length:
8"
.40
S&W Caliber
1:16 Twist
5/8x24"
Thread Pitch
..
Specifications:Length: 4.5"9mm Caliber1:10 Twist5/8x24" Thread Pitch4150 gun quality steel, heat tr..