Icarus Precision 311 Series 311 FUSE

The factory FUSE module already gives you integrated magwell and full grip length, so the 311 FUSE earns its upgrade a different way: mass and geometry. At 7.50 oz it carries more than double the weight of Sig's 3.50 oz polymer FUSE frame, and that extra mass sits low in the grip where it has the most leverage against muzzle flip, flattening recoil shot to shot in a way a polymer frame cannot match. The magwell is machined deeper and funneled more aggressively than the molded original, and the double-undercut trigger guard lets you ride higher on the bore axis than the factory geometry allows, so every round comes back on target faster.

Fitment notes: Fits FUSE (4.3in) slides. Takes MACRO 17/21-rd magazines. Thumb ledge: left- or right-handed, chosen at checkout.