SIG SAUER SIGM400 Rifle - Manual (Page 72)

72 www.sigsauer.com
10.0. Perform a Function Check of the SIG M400 Semi-Automatic Rifle
With the SIG M400 rifle and one UNLOADED magazine perform a function check of the rifle as outlined below in steps
1-13.
THE FUNCTION CHECK SHOULD ALWAYS BE DONE AFTER CLEANING AND ASSEMBLING THE RIFLE. ALWAYS VISUALLY
AND PHYSICALLY CLEAR THE FIREARM FIRST!
SIG M400 (SAFE/SEMI ONLY)
1. Insert an empty magazine into the magazine well until it locks into place.
2. Pull down on the magazine to ensure it is locked in place by the magazine catch.
3. Pull charging handle fully back then push it forward into locked position. The bolt carrier should now be held to the
rear by the bolt catch.
4. Depress the magazine catch .
5. The magazine should fall free of the rifle under its own weight (unloaded).
6. Push the top of bolt catch to release the bolt carrier. The bolt carrier will travel forward into the locked position.
7. Rotate the fire control selector to SAFE.
8. Press the trigger to the rear. The hammer should NOT fall.
9. Rotate the fire control selector to SEMI.
10. Press the trigger to the rear and DO NOT RELEASE IT. You should hear a loud click as the hammer falls. Keep the
trigger pressed to the rear; and
11. Pull the charging handle to the rear and release it while keeping trigger pulled. Hammer should not fall but be held
in the cocked position by the disconnect.
12. Release the trigger. A click should be heard as the hammer is caught by the trigger sear.
13. Press the trigger to the rear again and the hammer should fall.
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