You may need to rotate the buffer tube and receiver end plate in order to gain access to the takedown detent hole in the receiver. While pressing the buffer retainer into your receiver thread the buffer tube until it just threads over the top of the retainer.į) Insert the takedown detent followed by detent spring. Note that there is a groove on the tube to align the position of the receiver end plate, it should look like the following:Ĭ) With the receiver end plate on the buffer tube, thread the buffer tube into the lower receiver until it just begins to approach the buffer retainer hole, leaving room to install the buffer retainer.ĭ) Next install the takedown pin into your receiver.Į) Insert the buffer retainer spring and buffer retainer into your receiver. ![]() You will see why as you go, it’s just the nature of the AR design.Ī) Thread the castle nut all the way onto your buffer tube making sure the larger cutouts in the castle nut face away from the threads on the buffer tube like shown below.ī) Insert the receiver end plate over the threads of the buffer tube. This step groups several procedures together since they rely on each other to capture and retain parts. Top to bottom: Buffer Spring, Buffer, Buffer Tube, Castle Nut, Buffer Retainer Spring, Buffer Retainer, Takedown Detent, Takedown Detent Spring, Takedown Pin and bottom right is Receiver End Plate. Step 8) Rear Takedown Pin and Buffer Assembly Installation Make sure you do not bind the spring at this point.Ĭ) With the handle and spring in position, secure the handle to the receiver with the bolt and locking washer. Step 7) Safety Detent and Handle InstallationĪ) Insert the safety detent into your receiver with the pointy end facing the safety selector you installed on step 4.ī) Insert the safety detent spring into the handle like shown below, then install the handle with the spring inside the safety detent hole. Just keep aiming the detent into a towel. This step can be done without a roll punch however it is a little more difficult and it will probably take a few tries. It should look like the following:Ĭ) Next take the pivot pin (longer than the rear takedown pin) and with the receiver “aiming” into a rag, carefully push the pivot pin against the roll punch until you have swapped the locations and the detent is now in contact with the pivot pin. ![]() Carefully push the roll punch through your receiver while pressing the detent into the detent hole. NOTE: There is a good chance at some point during this step that you will shoot the detent out of your receiver on accident, so it is good practice to “aim” the detent into a towel or direction while installation that will be easy to find a shot out part as tiny as the detent! Trust me on this one.Ī) Insert detent spring and detent into your receiver.ī) This can also be a tricky step and it helps greatly to have a XX roll punch to slide through your receiver to hold things in place during installation. Once your magazine catch barely passes over your receiver let it retract back into your receiver. Use a roll punch to press against the magazine catch button while threading magazine catch on the other side. Step 4) Hammer and Safety Selector Installation You will have to wiggle the trigger and disconnector to have the holes line up so that the pin can go all the way through. This can be a tricky step since the spring is applying tension to the trigger making if difficult to align with the disconnector and receiver. The ends of the trigger spring should be facing toward the magazine well on the bottom of the trigger pocket.ĭ) Align the holes of the trigger and disconnector through your receiver so that you can push the trigger pin through. ![]() The larger end is pressed into the trigger as shown below, once installed it should stay firmly in place.Ĭ) Insert the disconnector on top of the trigger like shown below, then drop the trigger assembly into your lower and start the installation of the pin on either side of your receiver. ![]() Note that the spring is flared or tapered, one end is larger than the other side. The trigger and hammer spring look similar however the hammer spring is a bit thicker and stronger.ī) Next you will insert the disconnector spring into the trigger. Trigger, Trigger Spring, Disconnector, Disconnector Spring, Trigger Pin (same as hammer pin)Ī) The first step for trigger assembly is to properly install the trigger spring on to the trigger as shown below.
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