Mossberg FLEX System Shotguns - Manual (Page 7)

PART N0. 100848 REV. A 7
b) Locate tactical light switch in light switch pocket (Fig. 10) and
press down firmly (Fig. 11).
Fig. 11
Follow the same procedure to remove tactical light switch and
replace with tactical light switch blank.
To avoid damage to the accessory and to prevent possible personal injury,
before firing live ammunition verify by hand that the accessory is securely
locked into place and perform a function test per instructions in your
firearm’s owner’s manual.
USING A VERTICAL GRIP ON THE TACTICAL FOREARM
Attach vertical grips per the grip manufacturer’s instructions.
When using a vertical grip, DO NOT fire rounds heavier than 2- 3/4” 00
buckshot. The high recoil of the heavier rounds may cause excessive
wear of the forearm latch, which may lead to damage or failure of the
latch.
When using a vertical grip, use only grips with a long base as shown in
Fig. 12a. Short-base grips as shown in Fig. 12b may cause damage to
the Picatinny rail.
Fig. 12a Fig. 12b
CORRECT GRIP INCORRECT GRIP