Shop › BAD BATTELARMS THMPR 30 CAL MD BLK BAD BATTELARMS THMPR 30 CAL MD BLK $64.00 Battle Arms Development Thumper, Compensator, 308 Winchester/762NATO, Nitride Finish, Black, 5/8X24 Threaded BAD-THUMPER-30-BN Quantity: Add To Cart Added! Battle Arms Development Thumper, Compensator, 308 Winchester/762NATO, Nitride Finish, Black, 5/8X24 Threaded BAD-THUMPER-30-BN