GUNSMITHING LOWER RECEIVERS

[drdanno84]

Who installs lower parts in stripped receivers
preferably San Gabriel valley

[BlackCatRacing#13]

Question

Who installs lower parts in stripped receivers
preferably San Gabriel valley

What Lower Parts are You having Trouble with ??
You should be able to Install Your LPK at Home (unless its Broken)





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[drdanno84]

I UNDERSTAND YOU NEED SPECIAL SIZE PUNCHES TO INSTALL ROLL PINS, I.E. BOLT RELEASE?

[BlackCatRacing#13]

HAPPY HAPPY ~ JOY JOY

Tools:

I have compiled a list of tools that I recommend picking up or borrowing that will help make building your lower receiver easier. The following are the tools that I use for my builds:

Bench vise – This provides you with the ability to keep your hands free.

Ar-15 lower receiver vise block – This goes into your lower receiver magwell and will hold the lower receiver securely in place when in the bench vise.

Roll pin punches of 3/32”, 1/8” and 5/32” size – These are different that other punches because they are made specifically for roll pins. They have a small raised bump on the tip of the punch that fits directly into the roll pin to avoid flattening of the roll pin when driving it into place.

Roll pin holders – These hold the roll pin when you start tapping the roll pin into place. I found these to almost like having an extra hand and I highly recommend them.

Small brass hammer – It is not always best to have a large hammer or mallet. You will want to be accurate when pounding roll pins into place and the brass is non-marring to the lower receiver if you should slip.

Needle nosed pliers – These come in handy for helping to hold detents.

Razor blade – This will be used specifically when installing the pivot pin detent. That reminds me, try and pick up some extra detents because you will more than likely rocket a few into oblivion to never be found again.

Roll Pin Pusher (R.P.P) – I discovered this tool from visiting a local gunsmith. It is used for installing the roll pin that holds the trigger guard in place. There are two “dog ear” tabs on the lower receiver where the trigger guard goes. Those can, and will, break if you are not supporting the ears correctly when pounding the roll pin in place. Instead of pounding that roll pin into place, this tool pushes it. For me, this tool alleviated a lot of anxiety of possibly breaking my expensive lower receiver. You can see me using the R.P.P in this video.

Block of wood – If you choose not to use the R.P.P, you will need a block of wood to help support the “dog ear” tabs when pounding the trigger guard roll pin into place. This is the method I use and demonstrate in the video above.
Castle nut wrench – This is used to tighten the castle nut on the lower receiver extension.

Pencil – This comes in handy for using the eraser end of the pencil since it is rubber. It will be used for installing the magazine catch and buffer retainer.

Painter’s tape or electrical tape – This will be wrapped around your lower receiver during installation of the bolt catch assembly to protect the lower receiver from unnecessary scratches.

Gun oil – This will be used to lubricate difficult roll pins, and various other parts that you will be installing into your AR-15 lower receiver.

[SoCal Bob]

These should help:

http://www.ar15.com/content/guides/assembly/lower/

http://www.calguns.net/OLL/assembly.html

[drdanno84]

Thanks guys! lots of useful information and resources

[killmime1234]

I did my first AR with a hammer, a set of allen wrenches (that I used as roll pin punches), and a pair of channel-locks. They're really not hard to put together.

[SMarquez]

I did my first AR with a hammer, a set of allen wrenches (that I used as roll pin punches), and a pair of channel-locks. They're really not hard to put together.

That's about all I used. I couldn't believe how simple it was.

[onefortheroad]

Tape, hammer, punches, and some needle nose pliers. Harbor freight has everything cheap. Get a brass hammer if you like but it's not needed. Just be careful. I took my time and was careful. Granted, a vice block would have been nice.

I put two together a few weeks ago and I'm very new to firearms.

Oh I also used a piece of wood to support the dog ears. Better safe than sorry.

I used ar15.com guide to talk me through the first one.

[onefortheroad]

These are the proper tools and would make it very easy. I own in a machine shop and work with tools everyday so I cut corners on some of the tools or used what I had.

[dyson]

You can use a roll of masking tape to support the trigger guard while tapping the roll pins in

[SoCal Bob]

Important note: the disconnector spring is wider on one end. The wider end goes down into the trigger assembly, the disconnector will not function reliably if the spring is reversed.