Description
UM Tactical’s BOLT CARRIER GROUP 5.56 LOW MASS Black Nitride with UM LOGO-In addition to looking awesome, our sleek new Low Mass Bolt Carrier means less reciprocating mass when you fire your rifle, which means less gas is needed to operate the gun. This makes your gun shoot softer and move less, so you can stay on target for faster shot -to – shot and target- to – target transition times.
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