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US RIFLE M14A1

 

             

                  Cal 7.62mm M14A1                                            Cal 7.62mm M14A1 with Bipod

 

I.            DESCRIPTION

   Like the US Rifle M16A1, the M14A1 is a shoulder weapon, light weight, air-cooled; gas operated, and magazine-fed. It is designed primarily for automatic fire. The rifle has the following added features

              a. It has a stabilizer assembly, modified bipod, front and rear handgrip, straight line stock, and rubber coil pad.

             b. Its stock has a fixed pistol grip and folding front handgrip that lies flat along the bottom of the stock when not in use. The location of the front handgrip can be adjusted to one of the five positions in 2.5 cm. (1 inch) increments to accommodate all firers.

              c. The stabilizer assembly consists of perforated steel which slide over the flash suppressor and is fastened to the bayonet lug by a screw and a locknut. The stabilizer provides muzzle stability and reduces recoil. 

 

II.     GENERAL DATA

                 a. Weights (in pounds)

                        Rifle with full magazine and cleaning equipment………...................……..11.25 lbs.

            With full magazine, cleaning equipment, selector, and bipod.............…11.85 lbs.

            Empty magazine…………………………………….............................……………0.50 lbs.

            Full magazine (with ball ammunition)……………………….........................1.50 lbs. 

            Cleaning equipment…….………………………………...........................………..0.66 lbs.

            M2 bipod…………………………..............................………………………………..1.75 lbs.

            With full magazine………………………….…………...........................……….…13.12 lbs.

    

b. Lengths (in inches)

                        With flash suppressor…………………………………………........................…..44.3 in.

            Barrel……..………………………………………………….............................………22.0 in.

 

c. Operational Characteristics

                        Muzzle velocity………………………………………..2,800 feet/sec

            Cyclic rate of fire……………………………………...700 – 750 rds/ min

            Maximum rate of fire

        Semi – automatic……………………………...40 – 50 rounds/ min

        Automatic……………………………………...120 – 150 rounds/ min

        Sustained rate of fire…..…………………..….8 – 10 rounds/ min

            Maximum range…………………………………………………3,725 meters

            Maximum effective range…………………………………………460 meters

 

 

III.     CLEARING THE RIFLE

             Attempt to engage the safety. (If unable, continue with the next step.) Remove the magazine by placing the right thumb on the magazine by patch and curl the remaining fingers around the front of the magazine. Press in on the latch, the base of the magazine well. Pull the operating rod handle all the way to the rear, reach across the receiver with the right thumb, and press in on the bolt. Check the safety of the rifle by tilting it and looking into the chamber a receiver to insure that no ammunition is inside.

 

IV.     DISASSEMBLY

             The M14A1 rifle has three (3) main groups to be disassembled and assembled. These are the firing mechanism, barrel and receiver group, and stock group.

         a. To remove the firing mechanism group or trigger housing group, grasp the rear of the trigger guard with thumb and forefinger of your right hand and pull downward and outward as far as the guard will go. Lift out the firing mechanism.

         b. To separate the barrel and receiver from the stock, lay the weapon flat on the surface with the sights up and muzzle to the left. Grasp the receiver with the left hand over the rear sight and raise the rifle.

  

Figure 3-28.-Group assemblies of the M14 rifle.

 

            Figure 3-28 shows how the M14 rifle breaks down into seven group assemblies. You should be able to disassemble the rifle to this extent for cleaning, lubrication, and maintenance. This procedure is called field stripping the rifle. The names of the numbered group assemblies shown in figure 3-28 areas follows:

                    1. Magazine

                    2. Firing mechanism

                    3. Stock with butt plate assembly

                    4. Handguard assembly

                    5. Operating rod and connector group

                    6. Bolt assembly

                    7. Barrel and receiver group

 

        To withdraw the firing mechanism from the stock, proceed as follows:

            1. Remove the magazine.

            2. Place the safety in the SAFE position after making sure the rifle is cocked.

            3. Disengage the hooked end of the trigger guard from the firing mechanism housing.

            4. Swing the trigger guard away from the stock (but do not rotate it more than 90 degrees), and pull straight away from the stock to draw out the firing mechanism.

 

        To remove a stock with a butt plate assembly after removing the firing mechanism, proceed as follows:

            1. Separate the stock with a butt plate assembly from the rifle by grasping the receiver firmly with one hand and striking the butt of the stock sharply with the palm of the other.

            2. Lift the stock from the barrel and receiver group.

 

        To separate the operating rod and connector group from the barrel and receiver group, proceed as follows:

            1. Depress the rear sight to the lowest position and turn the barrel and receiver group on its side with the connector assembly upward

            2. If the rifle has a selector, press in and turn the selector until the face marked "A' is toward the rear of the sight knob and the projection forward is at an angle of about 35 degrees. Then remove the connector assembly, as indicated in paragraphs 3 and 4.

            3. If the rifle has a selector shaft lock, press forward on the rear of the connector assembly with your right thumb, as shown in figure 3-29, until the front end can be lifted off the connector lock.

            4. Rotate the connector assembly about 35 degrees clockwise until the slot at the rear is aligned with the elongated stud on the sear release (fig. 3-30); then lower the front end of the connector assembly and lift it off the sear release.

 

Figure 3-29.-Disengaging the connector assembly.

 

Figure 3-30.-Removing the connector assembly.

 

        The next step is to remove the operating rod spring guide, the operating rod spring, and the operating rod. These parts are identified as 2, 3, and 4, respectively, in figure 3-31. The correct step-by-step procedure is as follows:

            1. with the barrel and receiver group upside down, pull forward on the operating rod spring, relieving pressure on the connector lockpin. Pull the lock outward to disconnect the operating rod spring guide.

            2. Remove the operating rod spring guide and the operating rod spring. Turn the barrel and the receiver group right side up.

            3. Retract the operating rod until the key on its lower surface coincides with the notch in the receiver. Lift the operating rod free and pull to the rear, disengaging it from the operating rod guide.

       

Figure 3-31.-Component parts of the operating rod and connector group.

 

            To remove the bolt after removal of the operating rod, grasp the bolt roller that engages with the operating rod and slide it forward. Lift upward and outward to the right with a slight rotating motion and remove the bolt from the receiver. The weapon is now field-stripped for cleaning.

 

 V.     ASSEMBLY

         Place the barrel and receiver group on a flat surface, sights down. Pick up the stock group and engage the stock group down onto the barrel and receiver group. Unlatch and open the trigger guard keeping the floor plate of the trigger housing level, place the trigger housing group straight down into the receiver, making sure that the guide rib on the housing enters the recess in the receiver. Close and latch the trigger guard.

 

Reassembly of this weapon is basically the reverse of disassembly.