Figure 2-27.--Remington M870 shotgun.
REMINGTON M870 SHOTGUN
The M870 shotgun, used by the Navy for guard
work, is a manually operated, magazine-fed (tubular),
Figure 2-28.--Remington M870 receiver nomenclature.
pump-action shoulder weapon.
Technical Description
SINGLE LOAD.--Push the safety to the SAFE
The essential features of the Remington M870
position. Press in the action bar lock (fig. 2-28) if the
shotgun are displayed here in chart form for easy
action is cocked and pull the fore-end (forward
reference.
handgrip) fully to the rear. Place the shell into the open
ejection port upon the downthrust carrier. Slide the fore-
Length of shotgun
39 inches
end toward the muzzle to load the shell into the barrel
(approximately)
chamber and lock the action closed.
Length of barrel
20 inches
MAGAZINE LOAD.--Push the safety to the
4
Magazine
SAFE position. Slide the fore-end completely forward
capacity-rounds
to close the action. Turn the gun bottom upward and
press the shell against the carrier, then forward fully into
12
Shell (gauge)
the magazine. Make sure the rim of the shell snaps past
12 gauge, 2 3/4 inch
the shell latch to prevent the shell from sliding backover
00 buck, military round
the carrier. Should this occur, open the action or, if
necessary, remove the trigger plate assembly (fig. 2-29),
Crossbolt type
Safety
if the gun is cocked, to remove the shell.
LOADING THE BARREL FROM THE
Functioning of the Remington M870
MAGAZINE. --Shells can be fed from the loaded
magazine by simply pumping the fore-end. Press in the
The M870 shotgun can be loaded and unloaded in
action bar lock if the gun is cocked. Pump the fore-end
several different ways. The following paragraphs
back and forth to open and close the action.
describe the different options for loading and unloading
the M870 and how to operate the mechanical safety. A
single load puts a round directly into the chamber for
fast firing, while a magazine load fully loads the tubular
magazine, but does not chamber a round. Loading the
barrel from the magazine chambers a round from the
loaded tubular magazine for firing.
SAFETY. --Before loading or unloading the
weapon, push the safety (fig. 2-28) across the rear of the
trigger, left to right, to the SAFE position (the red band
on the safety will not show).
FIRE POSITION.--Push the safety across to the
FIRE position (the red band on the safety will show).
The trigger can then be pulled to fire the gun.
Figure 2-29.--M870 trigger plate assembly.
2-15
