Sig Sauer MCX/MPX Folding Telescoping Stock Polymer (Black) HK417 A reliable tracer unit that

A reliable tracer unit that operates on 4x AAA batteries (not included)

The corners of the gearbox that surround the cylinder feature a smooth radius

Features the proven ARES E

Fits 1911 style magazines

Sig Sauer MCX/MPX Folding Telescoping Stock Polymer (Black) HK417 A reliable tracer unit thatThis is a factory replacement stock for the SIG Sauer MCX MPX. It both folds and telescopes. The stock attaches easily to the firearm receiver via the receiver's 1913 interface. It is made of reinforced polymer material and has sockets for push button QD sling swivels. Reinforced polymer construction Side folds Telescopes Attaches to receiver via 1913 interface Black