Military Armament M10 SMG Instructions Manual

							G. Removal of Magazine 
Grasp magazine in left hand and with left thumb press magazine 
catch to release magazine. (See Fig. 8) 
FIG. 8 
H. Fire Selector lever Operation 
Located on the left side of the frame the selector is rotated 10 
select ‘semi’ automatic or ‘full’ automatic fire. (See Fig. 9) 
FIG. 9 
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							I. Firing the Submachine Gun 
As the bolt is moved back to the cocked position, the recoil spring 
is compressed and the sear engages the sear notch of the bolt. 
When the trigger is pressed, the sear releases the bolt, which is 
driven forward by the recoil spring. During this forward move- 
ment, the bolt strips a cartridge from the magazine into the 
chamber. The bolt continues forward and fires the cartridge. 
When the cartridge is fired, the chamber pressure forces the 
bullet out of the muzzle of the barrel. At the same time, this 
pressure overcomes the forward movement of the bolt and starts 
it to the rear. By the time the bolt and empty case have moved to 
the rear far enough to open the rear of the chamber, the bullet has 
left the barrel, and the chamber pressure has diminished. (In the 
submachine gun, the chamber pressure is relatively low and the 
bolt is relatively heavy; this eliminates the need for positive lock- 
ing and unlocking.) During the rearward movement of the bolt, the 
empty cartridge case is extracted and ejected, the recoil spring 
is compressed and the top round in the magazine moves up 
against the lips of the magazine. The rearward movement of the 
bolt is stopped by contact with the buffer plate. 
J. Malfunctions 
Malfunctions are usually the result of worn parts or improper care 
of the gun. A knowledge of how the gun functions enables the 
user to classify and correct the malfunction. Listed below are the 
types of malfunctions which might occur. 
1. Failure to Feed. The top cartridge in the magazine is not po- 
sitioned up and in front of the bolt. Most malfunctions of the 
submachine gun are failures to feed caused by a defective or 
dirty magazine. 
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							2. Failure to Chamber. The top cartridge from the magazine is not 
seated in the chamber. 
3. Failure to Fire. The cartridge is chambered but does not fire. 
4. Failure to Extract. If the cartridge fires, the chamber pressure 
will normally push the empty cartridge case out of the 
chamber. If the cartridge case is not completely removed 
from the chamber and the bolt is retracted, then there is a 
failure to extract. This malfunction seldom occurs. 
5. Failure to Eject. The empty cartridge case is not ejected from 
the weapon. 
6. Failure to Cock. If the bolt is retracted and is not held by the 
sear, or if, during firing, the bolt does not move to the rear 
far enough to clear the top cartridge in the magazine, the gun 
fails to cock. 
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							Common Malfunctions. The two most common malfunctions are: 
1. Failure to feed-usually caused by a defective magazine. 
2. Failure to fire-usually caused by defective ammunition. 
Causes of Malfunctions. The following chart lists common causes 
of various malfunctions and corrective action. 
Foilwe to fe*d. Dirty or dented moga~in~. Roplaco magazine. 
Weak or broken magazine spring. Replace magazine. 
Worn magazine notch. Replace magoxine. 
Corroded ammunition. Replace ammunition. 
Worn or broken magazine catch. Replace mogorinc catch. 
Foilura to chombcr. Dirty chamber 
Obstruction in chamber. 
Weak recoil springs. Clean chombcr. 
Remove obstruction. 
Replace recoil spring. 
Failure to fire. D*fectiw ammunition. 
Def*ctiw firing pin. 
Weak recoil springs. Replace ammunition. 
Replace bolt. 
Replace recoil springs. 
Foilur. to l xhoct. 
Failure to l jwt. Broken cicctor. Replace oiactor. 
Broken or misting extractor. Replace extractor 
F&lure to cock. Worn scar. 
Worn sear notch. 
Bent guide rods. 
Low powered ammunition Replace scar. 
Replace bolt. 
Straighten. 
Replace ammunition 
Prevention of Malfunctions. Periodic inspection and proper care 
and cleaning will reduce the possibility of the submachine gun 
malfunctioning. 
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							4. STRIPPING AND REASSEMBLING 
The Model 10 and Model 11 have been designed so that no special 
tools are necessary in order to’strip or reassemble the weapon. 
Stripping 
Before starting to strip the weapon remove the magazine and 
check the barrel chamber by looking through the EJECTION 
PORT to make sure there are no live rounds in the weapon. 
A. Field Stripping consists of 
1) Removing Upper Receiver (Cock Weapon) 
Push receiver pin catch back and remove receiver pin. (See Fig. 
10). On alternate configuration where there is no receiver pin 
catch, a sharp push on the receiver pin is all that is required for 
removal. 
Push upper receiver from frame. (See Fig. 11) 
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							FIG. 10 Removing Pin Securing Receiver Group 
‘IG. il Removing Barrel and Receiver Group 
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							2) Removing the Bolt 
Slide cocking handle to rear of-guide slot, rotate handle a few 
degrees and pull from bolt. (See Fig. 12) The bolt and recoil 
spring assembly can now be removed from the rear of the re- 
ceiver. (See Fig. 13) 
FIG. 12 Removing Cocking Handle 
FIG. 13 Bolt Remover from Rear of Receiver  
						

							3) Removing the Stock 
To remove stock, depress stock latch button and keeping pressure 
on button pull stock completely out. (see Figs. 3 and 4) 
The procedure mentioned above is generally sufficient for 
normal maintenance and cleaning. If necessary to clean trigger 
mechanism, removal is as follows: 
B. Trigger Mechanism 
Lift retainer and remove selector lever, this aldo allows removal 
of sear, sear spring and tripping lever. Push trigger pin out of the 
left side for removal of trigger or torsion spring. Note: for re- 
assembly, free arm of torsion spring is located on rear side of 
disconnector. Disconnector may be replaced by using a pin 
punch to remove spring pin. 
C. Extractor 
Use pin punch to remove extractor spring pin. 
D. Recoil Spring 
Compress spring and move guide rod clear of bolt and use pin 
punch to remove spring pin from guide rod. 
E. Receiver Pin Catch 
Use pin punch to remove spring pin. 
F. Magazine Catch 
Use flat bladed screw-driver to remove screw in hand grip for 
access to catch. 
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							G. Safety Catch 
Use pin punch to remove catch spring pin. 
H. Stock Latch 
Press down lightly at center of pin and slide to either side to re- 
move retaining pin. Invert frame and latch will drop out. 
I. Magazine 
M1./9MM Poro, Ml 1 380 ACP 
Depress stud in floor plate and slide plate from magazine case. 
Keeping finger over the bottom of the magazine to prevent the 
magazine spring from flying out. Remove the magazine spring and 
the magazine follower. 
M10/45 ACP 
Lift the tab in the floor plate by inserting a screw-driver in the 
hole. Remove base plate, placing the finger over the bottom of 
the magazine to prevent the magazine spring from flying out. 
Remove the magazine spring and the magazine follower. 
NOTE: To achieve the proper functioning when reassembling 
the Ml1 and M10/45 magazine ensure that the slope of 
the top coil of the spring corresponds with the slope on 
the follower. 
5. REASSEMBLY 
Items are reassembled in the reverse order to the stripping pro- 
cedure. 
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							6. CLEANING AND 
It is essential for reliable operation and performance. that the 
weapon receive careful maintenance. It should be cleaned at 
the end of each day’s firing. 
The Gun need only be “field stripped” for this maintenance. 
Barrel and Receiver Group Cleaning 
A. 
B. 
C. 
D. 
E. 
Bolt 
A. 
6. Use cleaning rod, patch and solvent. Stubborn residue can 
be removed with a bristle bore brush. 
Swab bore with patch saturated in solvent. 
Use solvent saturated patch and swab inside of receiver to 
remove residue. 
Use clean dry patch to dry barrel and inside of receiver 
group. 
Dampen patch with light oil and swab barrel and receiver. 
Assembly Cleaning 
Remove powder residue with solvent and patch. 
Wipe all surfaces of bolt to remove carbon. The bolt face 
should be completely free of carbon and other residue. 
C. Wipe dry and apply a light coat of oil. 
Frame Assembly Group Cleaning 
A. Remove residue build-up on exposed surfaces with solvent- 
soaked cloth. 
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