SIG Sauer SIG516 G3 5.56 AR Pistol - 11.5" - 1x 30rd Mag

The SIG Sauer SIG516 G3 delivers a piston-driven AR platform that runs cleaner and cooler than direct-impingement rifles, solving the carbon fouling and heat buildup that plague standard ARs under heavy use. Built for duty, defensive, and range applications, this rifle delivers proven reliability across high round counts.

Features:

• 11.5-inch cold hammer-forged barrel with a 1:7-inch twist rate
• Short-stroke, adjustable gas piston system for reduced heat and fouling
• Fully ambidextrous controls including bolt catch, magazine catch, safety, and charging handle
• SIG Matchlite DUO curved trigger and SIG flash hider compensator
• Free-floating M-LOK handguard for accessory mounting

Unlike a standard direct-impingement AR, the SIG516 G3 moves gas operation away from the bolt carrier group entirely, routing it through a short-stroke piston that keeps carbon and heat out of the action. The adjustable, three-position gas valve lets shooters tune the system for different ammunition or suppressed use without any separate parts, while steel-reinforced components in high-wear areas like the cam path and feed ramp extend the rifle's service life under hard use.

Built on an AR pistol lower with an 11.5-inch barrel, this configuration ships with one 30-round polymer magazine and is intended for shooters who want the SIG516 G3's piston system in the shortest, most maneuverable package the platform offers.

SIG SAUER has manufactured firearms in Newington, New Hampshire for the U.S. military, law enforcement, and civilian markets for decades. Backed by the SIG SAUER Infinite Guarantee, SIG's pistols and rifles are built to perform for a lifetime of use.