AR Sponsor
Posted: 3/1/2013 8:27:41 PM EDT
| I bought a DD 9.5 fsp handguard and want to put it on my AR. However, I've never taken off a gas block, and have heard that removing the gas block can mess up the "factory tightness" of the gas block pins. The guy that told me about this problem, said he had a gas block that he taken off and put back on, that actually came loose while he was shooting. I was wondering if anyone else has ever seen/heard of this happening. |
|
Nope never heard of that. Which way is your gas block attached? By set screws or a pin? The pins are reallly tight and I had trouble getting mine in it was so tight. If it is a set screw just put some lock tite on it when you reinstall.
Quoted:
I bought a DD 9.5 fsp handguard and want to put it on my AR. However, I've never taken off a gas block, and have heard that removing the gas block can mess up the "factory tightness" of the gas block pins. The guy that told me about this problem, said he had a gas block that he taken off and put back on, that actually came loose while he was shooting. I was wondering if anyone else has ever seen/heard of this happening. |
|
The guy that told you about this didn't get the block back on correctly, that's all.
If your block is pinned on, it will likely be a royal pain to remove the pins and then remove the block. But once you're ready to put it back on, it will not be a big deal to do it right. Like a FSB, you get the pin holes lined up, start one pin to align the whole thing, then start the other pin. After that, just drive the pins back in to be as even as they were before you removed them. (Yes, you should take notes and/or pictures before you start.) Clamp and setscrew type blocks are easier mechanically to remove and reinstall, but you need to pay attention to the alignment of the block when you reinstall it. And check with the block's manufacturer to find out the correct torque to cinch it down with. ALL gas blocks/FSBs may (or may not) take a couple of rounds fired to settle in and seal completely. But if you install it correctly, your block certainly won't just come off, |
| The only way that taking off the gas block and putting it back on again with the pin on type and it coming loose is if you hammer out the pins the wrong direction and totally muck up the holes in the gas block and barrel. It can be done. Drive them out from the small end towards the large end (remember they are tapered pins so one end is larger than the other) and put them in the same way they came out and from the same direction (TAKE NOTES) and you will not have it come loose. Measure them to make sure, do not eyeball and guess. Drive them out the wrong way, which is a bitch but it can be done, and the holes are too large for the pins to hold them correction since you have swaged them larger. Then you have to use oversized pins and you can only get away with this boo-boo once because I have never seen oversized oversized pins. |
|
Quoted:
The only way that taking off the gas block and putting it back on again with the pin on type and it coming loose is if you hammer out the pins the wrong direction and totally muck up the holes in the gas block and barrel. It can be done. Drive them out from the small end towards the large end (remember they are tapered pins so one end is larger than the other) and put them in the same way they came out and from the same direction (TAKE NOTES) and you will not have it come loose. Measure them to make sure, do not eyeball and guess. Drive them out the wrong way, which is a bitch but it can be done, and the holes are too large for the pins to hold them correction since you have swaged them larger. Then you have to use oversized pins and you can only get away with this boo-boo once because I have never seen oversized oversized pins. i want to see the muscle bound freak that drives a taper pin completely through the wrong way, must be one big sum bitch. |
AR Sponsor
Win a FREE Membership!
Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!
You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.