Sinclair bore guides feature a snout with a silicone ""O""-ring that inserts into your chamber, sealing the barrel off from the receiver.
This is for an AR-15 chambered in 6.8MM Remington SPC
Sinclair bore guides feature a snout with a silicone ""O""-ring that inserts into your chamber, sealing the barrel off from the receiver.
This is for an AR-15 chambered in 6.8MM Remington SPC