SIG SAUER SIG716 Rifle - Manual (Page 21)

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2.0. mechanical characteristics and Rifle theory
2.1 Rifle description
2.1.1 general
The Sig716 rifle is a gas operated short stroke pushrod rifle with a rotary bolt mechanism capable of semi-automatic or
full automatic fire depending on the model. Semi-automatic is defined as one round being fired each time the trigger is
pressed to the rear. full automatic or select fire is defined as a continuous rate of fire beginning with the initial press
of the trigger and continuing until either the magazine is depleted of ammunition or the operator releases the trigger, at
which time the trigger resets. The rifle is chambered in 7.62x51mm naTo and is compatible with .308 Winchester am-
munition.
2.1.2 barrel, Receiver and gas system
The barrel is mechanically mated to the receiver by means of a barrel nut, and the barrel extension. The flash suppressor
if applicable is screwed onto the muzzle end of the barrel via 5/8 x 24 TPi thread pattern. The gas block, which is fitted to
the barrel, contains the gas port and the gas valve which locates the pushrod to the upper receiver. The upper receiver
has an integral M1913 accessory rail for attachment of sights or optics.
FIG 1 Barrel wIth receIver and Gas system