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Posted: 12/18/2016 5:48:45 PM EST
[Last Edit: 12/18/2016 5:51:14 PM EST by paulwal]
I'm beating hard on this sucker, and the head of the pin is starting to deform. It's still only halfway in. It's on a Ballistic Advantage lo-pro gas block and Ballistic Advantage gas tube, using the roll pin the tube came with. Is it supposed to be this hard?
Link Posted: 12/18/2016 5:58:39 PM EST
Just use channel lock pliers.
Link Posted: 12/18/2016 5:59:45 PM EST
did you lube it a little and use a roll pin punch?,I switched to coiled roll pins along time ago,sometimes beveling them a bit and chase the hole in the gas block with a drill bit first by hand to clear out any burrs in there,to me the hardest is lining it up and sinking it
Link Posted: 12/18/2016 6:00:28 PM EST
Are you sure the gas tube is inserted all the way and the holes are aligned.
I normally use a punch to ensure alignment before driving the roll pin.
Link Posted: 12/18/2016 6:02:15 PM EST
Bevel pin, hold it with needle nose, and whack it
Link Posted: 12/18/2016 6:04:47 PM EST
[Last Edit: 12/18/2016 10:38:17 PM EST by paulwal]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By HawgPhixer:
Are you sure the gas tube is inserted all the way and the holes are aligned.
I normally use a punch to ensure alignment before driving the roll pin.
View Quote


That might be the issue. There are metal shavings in the bottom of the hole in the block where the tube goes in. I had to magnetize a punch several times to dig most of the shavings out. Perhaps there are still some in there causing a slight misalignment with the hole in the tube.
Link Posted: 12/18/2016 6:08:38 PM EST
Just knocked the pin out. The inside of the pin is clogged with metal shavings.
Link Posted: 12/18/2016 6:10:13 PM EST
[Last Edit: 12/18/2016 6:10:27 PM EST by HawgPhixer]
Try blowing it out with a compressor or canned air.
You may need to clear the chips with a drill bit, just spin it in the hole with your fingers.
Link Posted: 12/18/2016 6:24:14 PM EST
[Last Edit: 12/18/2016 6:24:28 PM EST by paulwal]
Finally got it. I wasn't expecting this to be the toughest part of building an AR.

http://imgur.com/a/t5tF2

I took the pin out, and the tube was fused into the gas block. I blew out the hole and scraped around in there as suggested. Then I tapped on the end of the tube with a plastic hammer to seat it in there as well as possible. The pin finally went in... enough.
Link Posted: 12/18/2016 6:33:24 PM EST
Good job.
Next time, closely inspect the holes you are sticking stuff into.
Link Posted: 12/18/2016 6:39:03 PM EST
lesson learned,do this on a lower if you assemble yourself ( chasing the holes) glad it worked out for you
Link Posted: 12/18/2016 6:46:26 PM EST
Link Posted: 12/18/2016 7:13:43 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By HawgPhixer:
Are you sure the gas tube is inserted all the way and the holes are aligned.
I normally use a punch to ensure alignment before driving the roll pin.
View Quote





I do this followed by putting a couple of rubber bands around barrel and gas tube to freeze everything in place as I drive the pin in.
I bought a metric ton of stainless properly sized roll pins from McMaster-Carr and they are a one shot 100% success rate performer. No more bent, flowered pins needing being redone. Every single pin I ever got with a block or tube (even with bulk buys) have mostly been crap and get thrown into the recycle bin.
Link Posted: 12/18/2016 10:12:56 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By 44-40pro:
I do this followed by putting a couple of rubber bands around barrel and gas tube to freeze everything in place as I drive the pin in.
I bought a metric ton of stainless properly sized roll pins from McMaster-Carr and they are a one shot 100% success rate performer. No more bent, flowered pins needing being redone. Every single pin I ever got with a block or tube (even with bulk buys) have mostly been crap and get thrown into the recycle bin.
View Quote


Got a part number for those McMaster-Carr roll pins?
Link Posted: 12/18/2016 10:39:59 PM EST
Thanks all.
Link Posted: 12/19/2016 1:10:45 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By PoopdeckPappy:


Got a part number for those McMaster-Carr roll pins?
View Quote

92373A120 in 18-8 stainless. $5.19 for 100.
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