Shop › LUTH AR DELTA PACK LUTH AR DELTA PACK $12.21 Luth-AR Delta Pack, Black Finish, Delta Ring Assembly, Includes 1 Barrel Snap Ring, .223/5.56 Weld Spring, and Delta Ring BL-09D Quantity: Add To Cart Added! Luth-AR Delta Pack, Black Finish, Delta Ring Assembly, Includes 1 Barrel Snap Ring, .223/5.56 Weld Spring, and Delta Ring BL-09D