Rear sight



Front sight

6. Barrel

7. Barrel ratchet

8. Magazine

9. Retracting handle 10. Housing assembly

Figure 1. Submachinegun, MS, right side, stock extended.

1. Flash hider (accessory)

2. Barrel

3. Sling loop

4. Stock catch

5. Sling

6. Magazine loader (accessory)

7. Trigger

8. Trigger guard

9. Oiler

10. Magazine catch

Figure 2. Submachinegun, MS, left side, stock telescoped, sling removed, with flash hider.

Figure 2. Submachinegun, MS, left side, stock telescoped, sling removed, with flash hider.

1. Hand loader and cleaning rod 5.

stop 6.

4. Cover

Safety lock Cocking slot Barrel ratchet Housing assembly

Figure 3. Submachinegun, MSAl, right side, stock extended.

L85 Cocking Handle Slot Cover

4. General Data. a Barrel.

Diameter of bore J.45 inch

Twist in firing Uniform, right, 1 turn in

16 inches

Length of barrel 8 inches b. Gun.

Length, overall with stock extended____ ft?.,8 rinches

Distance between sights IO.875 mches

Weight without magazine (approx) °.15 pounds

Weight with 30 rounds in magazine . n or

(approx) b 10.25 pounds

Weight of 30-round magazine (empty) ' 5 pound

Weight of 30-round magazine (loaded) 2.10 pounds c. Miscellaneous.

Chamber pressure (approx) 12,000 to 16,000 pounds per square inch

Muzzle velocityiapprox) 900 feet Rer second

Cyclic rate of fire 450 rounds per minute

Sights 100 yards, fixed peep

Maximum range (approx) L50° meters

Maximum effective range (approx) 90 meters

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F M3A1 10 to 12 pounds

5. Differences in Models.

The M3 and the M3A1 are basically alike. However, though most of the parts are interchangeable, the bolt, the housing assembly, and the receiver are not. The M3A1, developed from the M3, was modified as follows:

a. The retracting handle assembly, retracting lever assembly, retracting lever spring, and oiler clip have been eliminated.

b. A cocking slot has been cut into the top front portion of the bolt, so that the firer can retract the bolt with his finger. There is an ejector groove on the bottom of the bolt, extending the entire length of the bolt, to permit removal of the bolt and guide rod group without removing the housing assembly. The retracting pawl notch has been eliminated, and a clearance slot for the cover hinge rivets has been added.

c. The ejection opening and the cover assembly are longer. This allows the bolt to be drawn back far enough to be engaged by the sear. The safety lock is located farther to the rear on the cover.

d. An oil reservoir and oiler have been placed in the pistol grip of the receiver assembly. The stylus on the oiler cap may be used as a drift to remove the extractor pin. The barrel ratchet has been redesigned to provide a longer depressing level for easier disengagement from the barrel collar.

e. A bracket has been welded at the rear end of the stock. This bracket is used as a hand loader for loading ammunition into the magazine; it also serves as a cleaning rod stop.

f. The barrel collar has two flat cuts to permit the use of the stock as a wrench to unscrew a tight barrel assembly.

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