SIG SAUER SIGM400 Rifle - Manual (Page 24)

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2.1.5. Lower Receiver Assembly and Butt stock
The lower receiver assembly contains the fire control mechanism, bolt catch, magazine well, magazine release, pistol
grip, sling attachment points, and butt stock assembly. The fire control selector is ambidextrous along with the magazine
catch. The fire control selector has two positions, SAFE-SEMI.
SAFE - Trigger is locked and rifle cannot be fired.
SEMI - The rifle will fire one shot with each press of the trigger.
Magazine release
Fire control selector
Sling attachment point
Bolt Catch Lever
FIG 5 LOWER RECEIVER ASSEMBLY
11SIG455_M400MiniManual.indd 24 8/2/11 3:58 PM