|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|
SIG Sauer – Upper Receiver Groups
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.
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