Shop › BALLISTIC BBL 5.56 18" SPR OPS12 PRO BALLISTIC BBL 5.56 18" SPR OPS12 PRO $175.75 Ballistic Advantage Modern, Barrel, 556NATO, 18", 1:7, SPR Rifle Barrel With Ops 12 Profile BABL556020M Quantity: Add To Cart Added! Ballistic Advantage Modern, Barrel, 556NATO, 18", 1:7, SPR Rifle Barrel With Ops 12 Profile BABL556020M