Posted: 8/4/2012 7:28:17 PM EDT
| Hey Steve, well, after destroying the locking nut and horribly scratching the halfquad on my elite operator 2, I got it off and replaced it with a troy alpha rail. But I noticed when I was changing out the gas block to a low profile one, that when you slide the gas block back on to the heavy barrel, it butts right up to the thick part of the barrel. My question is if I needed to check to see if the gas tube was too shallow or too deep into the receiver when I was putting the gun back together. I was assuming not just because it looked like the barrel was designed that way for the gas block to butt right up against the edge of the thick part of the barrel and therefore no need to worry about it. The reason I ask, if because when I had the gun back fully assembled, I would charge the bolt and if I try to let the bolt back slowly forward, it doesn't seem to want to seat forward all the way. It seemed to do this even when I first received the rifle, but I just wanted to know if this was normal or if this is a problem! Oh, but it seats forward all the way just fine when I let the bolt fly back forward full speed. Thank you again for any insight! |
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There would normally be a slight gap between the rear of the gas block and the step in the barrel (space for the handguard cap if you barrel had one on it in). If your replacement gas block is one of the short-bodied low profile versions, there may be a considerable gap there. You're going to have to mark the block and barrel for the gas ports in both, and line them up accordingly.
Steve/RRA |
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Quoted:
No I have not. Should I do that before even test firing it? And does anyone else's bolt stick a bit when they "walk" it forward slowly with the charging handle??? Thanks for the help guys  My understanding is that most AR's are shipped with some type of protecting oil that will gum up the working. To me it smelt like sawdust. So yes, you should clean it first. This includes a chamber brush. I know with mine if I walk it down slow and baby it sometimes it will catch and stop unless it's oiled well. This is without a round. With a round I have to FIGHT it to get it down! Leaping Gnome |
| Okay, I will get right on the cleaning! I just did the new troy rail install myself, and I have just been stressing that maybe I did it incorrectly because Steve said that the gas block shouldn't butt up against the wall of the heavy barrel profile, especially if the block is short bodied, and the troy low profile gas block is certainly short and thin. But at the same time, I am quite certain that the gas hole on the barrel and the gas hole on the block seemed to position together perfectly when I butted the gas block to the wall of the barrel so.........I guess I will clean it then go shoot a couple boxes of ammo just to make sure there are no short strokes or FTEs or FTFs. If not, I'll clean her up again and I guess she will be good to go and ready for anything! |
| Well thanks guys for all the help! Took the gun to the shop yesterday and had it fixed a little better. Turns out my gas tube wasn't in the receiver perfectly straight due to my barrel nut (which is badly stripped now). But one we straightened the gas tube up properly and I cleaned it a little, she works smooth as silk. Thank you again Rock River for building such a top notch AR. Now I just have to go shoot it for the first time to make sure my rookie gunsmithing is satisfactory! Wish me luck guys, thanks again |