gas block roll pin size

[308reloaded]

what size roll pin goes in the dpms 4 rail gas block.?  1/16Th?  the pin I have measures .097in. dia. 1/2" long

having hell of a time getting started.  next size smaller that I have falls through

[Matt.Cross]

This sounds like a good question for 98Z5V, he's an EXPERT on gas block roll pins, and he would be the first to warn you that loose gas block pins can grow a whole rifle like a dead tree grows mushrooms... SO BE CAREFUL!

[308reloaded]

I have heard the same thing.I have 3/32 roll pin to try tonight after work. plus a homemade roll pin installment  tool.

just a rod with hole drilled on end....drilled next drill size bigger than roll pin  made 1 for  1/16 and 1/8 roll pins also.

roll pin fits in the end, no wobble or falling out. or miss, and I rounded outside edges so not to hit anything and leave mark on gas block or what ever I use these for.

could someone tell me the correct size.  i make enough mistakes as it is..  it looks like gas block takes bigger than gas tube

[imschur]

They are difficult.

Here's what I do.

1. Get a roll pin punch of the correct size. I prefer the ones with the radius.

2. I then take a piece of 1" wide masking tape and wrap it around the punch while overlapping half of the pin. Probably 3 or 4 wraps

3. Hammer the bitch in. The tape holds it in line but is no match for the hammer

Alternatively I have done the same thing with the clear heat shrink tubing.

[imschur]

BTW Im missing fingers so it should be easier for you fully digited folks  <lmao>

[98Z5V]

Same as the AR-15 pin.  It's about 1/12th of an inch.  Hit this for exact dimensions:

http://www.biggerhammer.net/ar15/pins.html

[survivalshop]

It can help to radius or taper the front of the pin or the end you are trying to insert.

Put the pin in a drill press or battery operated drill & dress it at about a 45 deg. angle or so with a file or stone ,just a little to give it a start into the hole .

If you look close at a pin ,it has a little roundness to it already for this .

[308reloaded]

Same as the AR-15 pin.  It's about 1/12th of an inch.  Hit this for exact dimensions:

http://www.biggerhammer.net/ar15/pins.html

thank you .now I know I'm using correct size

I have saved that site. lots of info that I dont always remember

[SWshooter]

I think 98Z5V is the tactical roll pin moderator on this site, isn't that true Drew?

[imschur]

<thumbsup>

[98Z5V]

It's probably something I wish I didn't learn...  <lmao>

Those roll pins are dangerous items to keep hanging around.  I'm just sayin'...    :o <laughs>