Monk Customs Outer Barrel 'Helix'

This 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!