SIG Sauer – Upper Receiver Groups

SIG Sauer

SIG SAUER® offers complete SIG516 upper receivers featuring its advanced short-stroke piston pushrod system.  The SIG516 uppers allow operators to upgrade their current AR-15/M 16/M4-type rifles from direct gas impingement systems to the SIG SAUER advanced short-stroke pushrod system.  This advanced operating system reduces carbon fouling, excessive heat and unburned powder in the action, ensuring reliability and function that is unmatched. A standard 5.56mm NATO chrome-lined chamber and bore ensure reliable function in any environment. All models feature a free-floating, aluminum, M1913 quad rail and 1:7 right-hand twist bore configuration. The 7” and 10” uppers feature short heavy barrels, while the 14.5” and 16” offer mil-spec M4 profile barrels.

MCX Upper Receiver Assembly:
COMING SOON. Compatible with standard AR lowers (with conversion kit).  Multi-caliber.  Quick Change Barrel with SIG flash hider.  Carbon Fiber or Aluminum hand guard.  Self-regulating gas system.

M400 Rifle Upper Receiver Group:
Improved safety over even Mil-Spec AR's (extractor support pin).  Lightweight.  Available in 11.5″, 14.5″ and 16″ barrels.  SWAT, MOE or Keymod.  Available in 5.56mm and 300BLK.

SKU: 65806376 Categories: , Tags: , Brand:
SIG 516® Upper Receiver – 7″ UA516G2-7
SIG 516® Upper Receiver – 10″ UA516G2-10
SIG 516® Upper Receiver – 14″ UA516G2-14
SIG 516® Upper Receiver – 16″ UA516G2-16
SIG MCX Upper Receiver, 7.62x39mm, 8 in, Semi, Aluminum Handguard, Flip Sights UAMCX‐762R‐8B‐AL
SIG MCX Upper Receiver, 5.56 NATO, 16 in, Semi, Aluminum Handguard, Flip Sights UAMCX-16B-AL
SIG M400 Upper Receiver, 16 in, Enhanced, Semi, Black UAM400‐16‐EC
SIG M400 Upper Receiver Assembly Complete, 300 Black, 9 in, Elite, Semi, Black UAM400-300B-9B-ELITE
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