Shop › LUTH AR HELICAL 1 PIECE GAS RING 308 LUTH AR HELICAL 1 PIECE GAS RING 308 $4.09 Luth-AR Helical 1 Piece Gas Ring, .308 308-BT-01H Quantity: Add To Cart Added! Luth-AR Helical 1 Piece Gas Ring, .308 308-BT-01H