I need to buy some roll pin punches. What are the sizes of roll pin punches needed to work on the AR -15?
Thanks.

I bought a set from Matco thats served me well the set # is SPR9T and the sizes range or start at 1/16 and end at 5/16.

1/16 #1, 5/64 #2, 3/32 #3, 1/8 #4, 3/16 #6.    I find roll pin holders more useful than the punches.  #'s 1.2,4 and 5 as I learned it's easier and safer to press the pins in.  I use Moly-Slide when installing the pins.

  Got my holders (starters) from Brownells, punches are Lyman via Midway.  
458

Thank you both for responding. 458winmag, what do you use to press the pin in?

www.ar15.com/content/guides/
www.ar15.com/content/manuals/
Direct link to the Technical Manual


 I use a parallel jaw pliers.  These are pricey but the faces are smooth.  A large Vice grip or Channel lock would work as shown.  I try to keep tools for firearms dedicated to that.  

 The tools for our needs are generally better made, finished and designed for one purpose.  All that said you can buy tools to assemble, just about anywhere.  Just get the best quality you can afford.  Go slow and use lube on the spring pins, and their holes
458

For the lower receiver, 5/64" for the bolt stop pin, and 1/8" for the trigger guard pin. They are good to have, even if the Vise-Grip method is used to push them in- good for starting and the final setting the pin just in the right place. I haven't assembled an upper, so don't know those. The starter punches are also probably good to have, but I haven't picked those up yet.

Don't you mean 3/32 for the bolt catch? 5/64 is for the gas tube roll pin.