2aHawaii

Tools and Uses => Firearms and Accessories => Topic started by: HUCKLEBUCK on June 25, 2013, 01:42:55 PM

Title: Pin missing from AR10A4 gas block?
Post by: HUCKLEBUCK on June 25, 2013, 01:42:55 PM
Silly question, but look at this pic. You can see through the pin hole that locks the gas tube. All youtube videos show a solid pin being tapped into these and other AR gas blocks. So again, silly question, but is it possible this was pinned with a tubular type pin, that would explain seeing through it? I thought all pins for gas blocks are solid. Similarly, the pin next to the two set screws - on the bottom of the clamp, on the receiver side - is "see thru" too, though you can't see it in the pic due to the angle.
Title: Re: Pin missing from AR10A4 gas block?
Post by: survivorman on June 25, 2013, 02:01:30 PM
As far as I know all AR gas tubes are pinned in with a "hollow" roll pin.  The pin ate the bottom of the block is the pivot for the sling.
Title: Re: Pin missing from AR10A4 gas block?
Post by: Nihonjin on June 25, 2013, 02:08:37 PM
 :)
Title: Re: Pin missing from AR10A4 gas block?
Post by: SpeedTek on June 25, 2013, 06:10:51 PM
The hundreds of ARs I did have tension roll pins.

Solid pins offer no tension.
Title: Re: Pin missing from AR10A4 gas block?
Post by: HUCKLEBUCK on June 25, 2013, 08:25:39 PM

As far as I know all AR gas tubes are pinned in with a "hollow" roll pin.  The pin ate the bottom of the block is the pivot for the sling.
Oh that's for the sling....got it.
Yeah I watched many vids for gasblock installs and always heard 'roll pin' tapped in with a 'roll pin punch' but of course you can't see the hollow on the vid; they always looked solid....woops
Title: Re: Pin missing from AR10A4 gas block?
Post by: HUCKLEBUCK on June 25, 2013, 08:26:23 PM

The hundreds of ARs I did have tension roll pins.

Solid pins offer no tension.
Makes sense now....thanks!
Title: Re: Pin missing from AR10A4 gas block?
Post by: HUCKLEBUCK on June 25, 2013, 08:29:12 PM

I think  you're mistaken with the pin which holds in a pinned gas block. Gas tubes are held in place with a roll pin. To ease your mind, here are pictures of my factory Armalite gas block.
(http://i7.photobucket.com/albums/y284/elevensecdb8/image-1.jpg)
(http://i7.photobucket.com/albums/y284/elevensecdb8/image.jpg)
Yeah you're right. I was confusing videos I saw and what they showed pinning a gas block and what pins a gas tube. Got it now. Thanks for the pics too. Makes it clear.