owneRs manual: Handling & SafeTy inSTrucTionS - Sig Sauer

when it counts 2.0. Mechanical Characteristics and Rifle Theory2.1 Rifle Description2.1.1 GeneralThe SIG516 rifle is a gas operated short stroke pushrod rifle with a rotary bolt mechanism capable of semi-automaticoperation. Semi-Automatic is defined as one round being fired each time the trigger is pressed to the rear until themagazine is depleted of ammunition. The rifle is chambered in 5.56x45mm NATO and is compatible with .223 Remingtonammunition.2.1.2 Barrel, Receiver and Gas SystemThe barrel is mechanically mated to the receiver by means of a barrel nut, and the barrel extension. The flash suppressorif applicable is screwed onto the muzzle end of the barrel via ½ x 28 TPI thread pattern. The gas block, which is fitted tothe barrel, contains the gas port and the gas valve which locates the pushrod to the upper receiver. The upper receiverhas an integral M1913 accessory rail for attachment of sights or optics.FIG 1 Barrel with receiver and gas systemwww.sigsauer.com 21