AR15 FLAT TOP BIG HOLE UPPER RECEIVER FOR COLT SP1
AR15 FLAT TOP BIG HOLE UPPER RECEIVER FOR COLT SP1
AR15 FLAT TOP BIG HOLE UPPER RECEIVER FOR COLT SP1
AR15 FLAT TOP BIG HOLE UPPER RECEIVER FOR COLT SP1
AR15 FLAT TOP BIG HOLE UPPER RECEIVER FOR COLT SP1
AR15 FLAT TOP BIG HOLE UPPER RECEIVER FOR COLT SP1
AR15 FLAT TOP BIG HOLE UPPER RECEIVER FOR COLT SP1
AR15 FLAT TOP BIG HOLE UPPER RECEIVER FOR COLT SP1
AR15 FLAT TOP BIG HOLE UPPER RECEIVER FOR COLT SP1