Bolt/bolt carrier assembly – SIG SAUER SIGM400 Rifle User Manual
Page 22
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Bolt Rings
Extractor
Ejector
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 incorporates
a carrier key that transfers gas from the gas tube to the belt carrier assembly. 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
Bolt Carrier
Cam Pin
11SIG455_M400MiniManual.indd 22
8/2/11 3:58 PM
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