Mossberg MMR - Manual (Page 10)

10
With the firearm pointed in a safe direction and held in the proper firing position,
rotate the safety selector lever fully to the vertical “OFF” (FIRE) position (Fig. 15).
Pulling the trigger through its full travel to the rear will fire the firearm.
After the firearm is fired the action will be cycled by the gas system and automatically
load the next cartridge. The trigger must be fully released before the firearm will be
ready to fire again.
If there is a pause in firing, rotate the safety selector lever fully to the “ON” (SAFE)
position. If so equipped, the ejection port cover will automatically open when the
firearm is fired again or when the bolt is manually opened (Fig. 16).
Should a cartridge fail to fire after pulling the trigger, keep the firearm pointed
in a safe direction in case of a hangfire. Wait a few moments then pull the
charging handle to the rear to extract and eject the misfired cartridge and
segregate from other ammunition. Do not attempt to refire a misfired cartridge.
If at any time during firing, the sound of any given cartridge is noticeably
louder or softer than previous cartridges fired, STOP! Do not load or
fire additional cartridges until you have safely unloaded your firearm and
inspected it for possible damage or obstruction in the chamber or bore.
(The bore is the inside surface of the barrel.) Firing the firearm with a
bore obstruction can cause damage to the firearm and may result in serious
personal injury to the shooter and/or others nearby.
When firing a large number of cartridges in a short period of time, the barrel
of the firearm will become extremely hot. If this firearm stops firing with a
live cartridge in the chamber of a very hot barrel, remove the magazine and
chambered cartridge immediately and allow the firearm to cool. This firearm
could fire just from the heat of the barrel.
Fig. 15
Fig. 16
EJECTION PORT COVER CLOSED
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