SIG SAUER SIG516 Rifle - Manual (Page 26)

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The Sig516 is equipped with a telescoping butt stock. The butt stock may vary depending on the model.
release latch
2.1.6 gas Valve Position
The Sig516 gas valve has 3 or 4 positions depending on the model configuration.
FIG 8 adjustaBle Gas valve
FIG 7 maGPul moe Butt stock
Gas valve
Gas Block