Barrel Lug: Short lug
Battle Sight on RSL: 3
Bayonet Type: Spike
Bayonet Lug: Late, non cut
Bolt Carrier: Late Non-Cut
Gas Tube: Late 2 Piece
Gas Block: Early Late cast
Receiver Cover Takedown: Normal
Rear Sight Block: Uncertain
Serial Number Format: 8 Digits, 25005186
S/N on Components: Last 5 digits
S/N on Stock: 01586
Stock Swivel: /Side/
Trigger Group Type: Late Stamped