General Assembly

After cleaning, lubricating, and inspecting the weapon, the gunner assembles the weapon and performs a function check.

a. Replacing the Barrel Assembly. Insert the gas regulator plug into the gas hole bushing so that it is on the number one setting. (number 1 gas setting on the regulator faces towards the barrel). Place the gas collar over the front end of the gas regulator plug, while pushing against the spring, rotate counterclockwise until it stops. Insert one of the metal tabs of the heat shield in to the hole located of the sides of the gas hole bushing, than rotate it so that the other tab locks in place. Then push down on the heat shield so that it snaps onto the barrel. With gas regulator downward and carrying handle in the vertical position, place barrel on the barrel support (located on the gas cylinder). Keeping the gun upright, pull the barrel to the rear ensuring the gas regulator is guided into the gas cylinder. Pull the barrel fully into the receiver and rotate the carrying handle completely to the right, ensuring to count the number of clicks. If the number of clicks fall between 2 to 7, the headspace is set correctly. If the number falls outside 2 to 7, turn it in to the unit armor (make sure that the threads on the barrel are located on top and bottom and on the inside of the receiver make sure that the threads are located on the left and right) (Figure 3-24).

Figure 3-24. Replacement of the barrel assembly.

b. Replacing the Cover Assembly and Feed Tray. Position the feed tray on the receiver so that the feed tray guides are aligned with the receiver brackets. Place the cover assembly onto the receiver aligning its mounting holes with the mounting brackets on the receiver, close the cover assembly. Then, insert the spring pin into the holes to affix the cover and feed tray to the receiver (insert the spring of the spring pin into the hole than push in from right to left).

c. Replacing the Trigger Housing Assembly. Insert the holding notch on the front of the trigger housing into the forward recess on the bottom of the receiver. Rotate the rear of the trigger housing upwards and align the holes of the trigger housing with the mounting bracket on the receiver. Hold the trigger housing assembly and insert the spring pin into the hole, securing the assembly to the receiver. (insert the spring of the spring pin into the hole than push in from right to left) (Figure 3-25).

Figure 3-25. Replacement of the trigger housing assembly.

d. Replacing the Bolt and Operating Rod Assembly. Make sure the bolt and operating rod are fully extended (unlocked position). Insert the bolt and operating rod into the rear of the receiver (bolt upward, operating rod beneath bolt) ensuring the bolt is on top of the rails located on the left and right inner walls of the receiver. Push the entire bolt and operating rod assembly into the receiver as far forward as possible. Pull the

Figure 3-25. Replacement of the trigger housing assembly.

trigger to allow the sear to drop and the group to slide all the way into the receiver (Figure 3-26).

Figure 3-26. Replacement of the bolt and operating rod assembly.

e. Replacing the Driving Spring Rod Assembly. Insert the driving spring rod assembly into the receiver, sliding it all the way forward against the recess in the rear of the operating rod. Push in and lower the driving spring rod assembly to engage the retaining stud into the hole located on the bottom of the receiver (Figure 3-27).

Figure 3-27. Replacement of the driving spring rod assembly.

f. Replacing the Butt stock and Buffer Assembly. Position the bottom recess grooves of the butt stock onto the top of the receiver recess grooves. Slide the butt stock down until it locks in place on the receiver. Ensure the butt stock is secure.

g. Replacing the Handguard. Line the handguard on the bottom of the gas cylinder and push upwards. The handguard snaps in place.

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Knife Throwing Techniques of the Ninja

Knife Throwing Techniques of the Ninja

Knife Throwing Techniques of the Ninja. span stylecolor: 000000Do you want to learn the art of throwing knives? Ever wondered how it is done to perfection every time? Well here is your chance. This book contains well over 50 pages of detailed information and illustrations all about the art of knife throwing. This intriguing book focuses on the ninja's techniques and training. This is a must for all martial artists and anyone wanting to learn the knife throwing techniques of the ninja.span

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