SIG Sauer MCX Stock Adapter Kit

The SIG Sauer MCX Stock Adapter Kit lets AR-15 owners install an MCX folding stock assembly on a standard AR lower. Built from solid aluminum, this stock adapter is designed to hold up to heavy use while cleaning up the look of an MCX upper mounted on an AR lower.

Note: Compatible with .223, 5.56, and .300 caliber AR-15 lowers. Not compatible with collapsible stocks.

Features:

• Solid aluminum construction
• Adapts an AR-15 lower to accept an MCX folding stock
• Picatinny rail mounted on the rear of the lower receiver
• Captures the rear detent spring for the rear takedown pin
• Integrated QD sling cup
• Manufactured by SIG Sauer

The kit attaches to the rear of the receiver and adds a Picatinny rail so an MCX folding stock installs cleanly, without the awkward ledge that often shows up when an MCX upper is paired with a standard AR lower. The captured rear detent spring keeps the rear takedown pin functioning normally, and the built-in QD cup gives you a sling mounting point without extra hardware.

SIG Sauer brings the same quality and precision craftsmanship to this adapter that shooters expect across its firearms and accessories lineup.