SIG SAUER SIG556 - Manual (Page 35)

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Bolt Catch Lever
The SIG556 ® rifle is equipped with a bolt catch lever. The purpose of the bolt catch
lever is two-fold. The bolt catch may be manually engaged with the bolt pulled to
the rear (open position). This action locks the bolt open, allowing an unobstructed
view of the chamber area. During firing, with a magazine inserted, the bolt catch
will lock the bolt open after the last round in the magazine has been expended,
giving a visual indication the magazine is empty and allowing the shooter to visually
check that the chamber is clear. The bolt is engaged by the bolt catch lever when
the bolt catch lever is pushed upward by the magazine follower during the cycle of
operation. The bolt can be manually released (closed) by either depressing the bolt
catch lever or by pulling rearward on the charging handle and releasing.
CAUTION:
Dropping or jarring the rifle with the bolt locked open can cause the bolt catch lever to disengage. If a
magazine, loaded with ammunition, is inserted in the rifle when this occurs, a round will chamber with the potential for
an unintentional discharge. ALWAYS handle the rifle as if loaded whenever a magazine is inserted in the rifle. ALWAYS
place the safety lever in the “S” (SAFE) position and unload the rifle whenever shooting is complete.
12SIG599_SIG556MiniManual1511980Rev02.indd 35 9/12/12 12:40 PM