ODIN Works LOW Mass 223 Nitride Bolt Carrier Group BCG for AR15/M4 .223/5.56mm Steel Black NSN N ACC-223-BCG-LM. This BCG has been significantly lightened weighing in at only 9 ounces it dramatically changes the amount of mass reciprocating in your...
ODIN Works LOW Mass 223 Nitride Bolt Carrier Group BCG for AR15/M4 .223/5.56mm Steel Black NSN N ACC-223-BCG-LM. This BCG has been significantly lightened weighing in at only 9 ounces it dramatically changes the amount of mass reciprocating in your...