Monk Customs M4 Outer Barrel 'HELIX' AAP Guide Rods allow for tighter cornering and

allow for tighter cornering and cycle extremely fast

giving each one a distinctive metallic hue — and a conscience

3 possible limited-edition designs to discover

Hook wrench made of forged chrome vanadium steel (CRV)

Improved gas efficiency and recoil response

Monk Customs M4 Outer Barrel 'HELIX' AAP Guide Rods allow for tighter cornering andThis is Monk's latest addition to the world of M4 Outer Barrels. The unique and stylish twisted helix design stands out beautifully, especially when used in combination with a Monk style skeletonized hand guard! The clever O ring addition makes sure the inner barrel is always positioned in the center of the Helix Outer Barrel and sits tight! These outer barrels are 6 inches in length. * These will fit the Article one with the Red Engines, not with the