Sig Sauer TAPER-CAP-556 MCX/M400 5.56 NATO 1/2x28 Taper Cap - Black

The Sig Sauer TAPER-CAP-556 is an OEM muzzle taper adapter engineered to convert the factory tapered shoulder of Sig Sauer's 5.56 NATO barrels into a standard 90-degree shoulder with a 1/2x28 thread pattern. This lets shooters mount conventional flash hiders, muzzle brakes, and suppressors that expect a standard-thread interface on their Sig rifle.

Designed specifically for current Sig Sauer 5.56 NATO rifles including the MCX and M400 platforms, the taper cap installs in place of the factory tapered muzzle shoulder and provides the flat, perpendicular shoulder geometry required by the broader aftermarket. It carries a durable black anodized finish to match Sig Sauer's factory components and resist wear under repeated installation.

Compact and lightweight, the TAPER-CAP-556 is a straightforward factory-spec solution for Sig rifle owners who want to run standard muzzle accessories without resorting to custom barrel threading or a trip to the gunsmith.