SIG SAUER SIG716 Rifle - Manual (Page 22)

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2.1.3 bolt/bolt carrier assembly
The bolt carrier guides the bolt and controls locking and unlocking by means of the cam pin. The bolt carrier also
incorporates an integral contact surface for the pushrod. The bolt carrier is responsible for cocking the hammer.
FIG 2 Bolt carrIer
The bolt houses the firing pin, the extractor and the ejector. it incorporates locking lugs that lock the bolt into the barrel
extension. The cam pin passes into the bolt which allows for locking and unlocking and is retained in the bolt by the firing pin.
FIG 3 Bolt assemBly
Bolt rings
extractor
ejector
Bolt
Bolt carrier
cam Pin