The Sig Sauer 516 G3 runs a short-stroke piston system with a 3-position adjustable gas block that keeps the action running reliably across suppressed and unsuppressed configurations while reducing carbon and heat transfer to the bolt carrier. The 16" cold hammer forged barrel with FNC finish and 1:7" twist delivers consistent accuracy and long-term durability, while the SIG flash hider compensator manages muzzle rise for faster follow-up shots. Steel-reinforced high-wear components extend service life through sustained hard use. Includes (1) 10rd magazine. FEATURES: - Operating System: Short-stroke piston - Gas System: 3-position adjustable - Muzzle Device: SIG flash hider compensator - Handguard: Free-floating M-LOK - Trigger: Matchlite Duo curved - Rear and Side Non-Reciprocating Charging Handles - Overall Length: 32.6" collapsed, 36" extended