Ar15 Assembly (Lower/ Trigger Guard & Buttstock)

To install the trigger guard you’ll need the rifle bench block, the front sight bench block, a ballpeen hammer and a number 4 roll pin holder and punch.

• 1. Place your lower receiver on the bench block with the right side facing up. Use the front sight bench block or some other solid block, to support the left side trigger guard pin extension. It is very important to support the left side trigger guard pin extension. Driving the trigger guard pin in without support can break the extension and ruin your lower receiver.
• 2. Place your trigger guard in between the holes in front of the pistol grip with the trigger guard detent towards the front of the rifle and facing the right.

  

• 3. Depress the detent to lock the front of the trigger guard into the receiver.
• 4. Drive in the trigger guard roll pin using the roll pin holder, then finish the installation with the roll pin punch. The trigger guard roll pin should be driven in so that it is even with both sides of the receiver.
• 5. You should be able to open or close the trigger guard by pressing the plunger on the right hand side of the rifle.
• 6. You have now completed the assembly of the lower receiver and now it’s time to move on to the buttstock.

Installing Buffer tube and Buttstock 

At this point you should have completed the assembly of the upper receiver, the barrel and the lower receiver. The tools that you need to assemble the telescoping buttstock are; the lower receiver vise block, a armorer’s wrench, a prick punch, and a 4 oz. ballpeen hammer.

• 1. Put your lower receiver vise block in the vise and mount your lower receiver onto it with the rear facing you.
• 2. Thread the receiver extension nut (castle nut) onto the receiver extension (buffer tube) with the cuts in the nut facing to the rear.
• 3. Place the receiver end plate on the receiver extension with the dimple facing forward

  

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•  4. Start threading the receiver extension tube into the back of the receiver but stop just before the threaded portion of the tube covers up the buffer retainer hole.

  

  

• 5. Insert the buffer retainer spring and the buffer retainer into the hole and hold it down with your thumb.
• 6. Screw in the receiver extension until it captures the buffer retainer on its shoulder.
• 7. Insert the take down pin into the receiver from the right hand side with the cut in the pin facing to the rear of the rifle.

  

• 8. Insert the take down pin detent first with the rounded end facing forward, then the detent spring into the port on the back of the receiver. The spring should stick out about 1/2 of an inch.