User Manual

20
Troubleshooting
Before attempting any work on your M4 make
sure that the chamber and the magazine of your
shotgun are unloaded.
(See the instructions on loading and unloading).
The gun fails to fire
1) Check the safety catch: if it is engaged, push
the button to the fire position (page 8).
2) Check that there is a cartridge in the barrel.
If necessary, insert a cartridge following the
loading instructions (page 8).
3) Check the firing mechanism. If necessary,
clean and lubricate it.
Magazine cap
Especially after the first rounds, check that the
magazine cap is firmly tightened, to keep the
barrel against to the receiver.
The chrome barrel extension must be completely
contained by the receiver. None of the chromate
parts must be visible at the front of the receiver
(fig. 9).
Choice of ammunition
Correct functioning of the shotgun is only guarante-
ed with cartridges of a maximum length of 58 mm
(2” 3/4 - 70 mm chamber) or 66 mm (3” - 76 mm
chamber). The shotgun accepts cartridges with
rolled turnover or crimped closures, and with lead
or steel shot.
CAUTION: never use cartridges with a case
longer than the chamber.
Non-compliance to this rule would have serious
consequences for both the shotgun and the
shooter.
No adjustment to the shotgun is necessary to
fire any of the ammunition listed above.
All Benelli shotguns are subjected to a 1370 bar
burst test at the Italian National Proof House in
Gardone Valtrompia (Brescia).
ACCESSORIES AND ADJUSTMENTS
Rear sight adjustment
The rear sight can be adjusted for both windage
and elevation if the standard factory setting does
not meet shooter requirements.
Before attempting any work on your M4 make
sure that the chamber and the magazine of your
shotgun are unloaded.
(See the instructions on loading and unloading).
Windage (lateral) adjustment
Using a coin or the rim of a shell cartridge to
rotate the windage adjustment screw (fig. 69),
located on the right side of the rear sight assem-
bly, in the desired direction. Rotating the wind-
age adjustment screw in a counter-clockwise
direction moves the point-of-impact on target to
the left, in a clockwise direction moves the point-
of-impact to the right. Note on the windage
scale, the amount of adjustment made (fig. 70).
Elevation (vertical) adjustment
Use a coin or the rim of a shell cartridge to rotate
the elevation adjustment screw (fig. 71), located
on top of the elevating platform, in the desired
direction. Rotating the elevation screw in a
counter-clockwise direction raises the aperture
and the point-of impact of on target, in a clock-
wise direction lowers the aperture and point-of-
impact on target. Note on the elevation scale on
the rear surface of the elevating platform the
amount of adjustment made, or count the tactile
clicks of the screw.