Spike tactical - spartan model.
Forged Upper Receiver
8.1" Cold Hammer Forged Barrel
1/7 Twist Rate
1/2 X 28 Thread Pitch for Muzzle
5.56 Nato Chamber
.750 Gas Block Seat
M4 Feed Ramps
Black Nitride In and Out
10" M-LOK Rail
7075 T6 Barrel Nut
6061 T6 Rail
Continuous Top Rail
Free Floating 1 Piece
Q.D. Attachment Points
Adjustable Gas Block
3/32" Allen Screw Adjustment
.750 I.D.