3-Piece Collar Gunsmith Blank

This blank for 3-piece collars comes with an smaller diameter bore made specifically for pencil barrels. The bore measures 0.545″ which leaves enough room for a gunsmith to fit it to the smaller diameter of the barrel after removing the flare at the end of the barrel.

The M4-Delta is for the 3-piece long collar. The AEM5 is for the 3-piece short collar.

Gunsmith fit only, must be bored to match your barrel after removing the muzzle device shoulder flare.

Black Oxide 300 series stainless can be easily bored out with HSS tooling.

Due to the thicker wall of these spacers, they may move around without the suppressor in place since the outer collar cant compress it down like the thinner wall ones. Care must be taken to fit them snugly. Heat fitting or green Loctite sleeving compound (620) may be used as well to keep it in place.