New to owner, is it supposed to do this?

[MKing]

I finally got my Rt Pro today. It was a fleebay purchase and I doubt the last owner ever cleaned it. It was gummed everywhere with what I assume was at one time lube. Either that or actual old chewing gum. I spent a few hours cleaning it and de-gumbing it.

Now the bolt (lvl 7) moves down nice on the powertube with a tiny gap (showing the internal o-ring) but when I pull it up it releases from the power tune with a little suction sound, like a cheek pop. Is this normal or is there more stickyness that I missed?
Thanks

[michbich]

I checked on mine and it makes a little poping sound. So yes, it's normal.

[MKing]

I checked on mine and it makes a little poping sound. So yes, it's normal.

Thanks, I can put away the gumout

[Watcher]

Either mine doesn't make the sound, or I can't hear it over my bolt sliding on the powertube.

If anything it just means the o-ring is a little worn out or mine isn't broken in It should be fine.

Get some air


By the way, I know how you feel. I had a RT classic I got off of Ebay and I had to go through a lot to get it running... but once I did I was hooked on mags forever

Lets see, there was old paint still on the rail and mainbody I had to scrape off with an exacto-knofe, it had started to turn the metal by the twist-lock pin so I had to wire brush it off and re-paint it, all of the o-rings were shot, the reg/valve pin and spring pack was shot so I needed a new one, the air-ports were closed with RED loctite, the banjo bolt was screwed up, many of the sight-rail and grip-adapter screws were stripped, stripping, or loctited in place, the bolt spring was worn and gunked up, and the barrel was full of either oil or paint residue. The hardline is also dented and bent but it holds air and is workable so I left it.
It did have an ANS Level II Venturi bolt though, which I did like and have in my RT Pro right now...

After a lot of time, money, cursing, and powertool usage I have a beutiful, functional, and kick-butt RT classic

Take it from me, it'll be worth the trouble you had to go through to fix it up

[MKing]

Either mine doesn't make the sound, or I can't hear it over my bolt sliding on the powertube...

Thanks, luckily I had a long weekend to work on it and I haven't had to replace anything. It also helps that the gun is so much fun to work on.

New noob issue though. I gassed it up tonight and dry fired it a few time. It shoots fine unless I shoot it as fast as I can (only about 5 pulls a second). When I do that there is an odd sound. I know it is a pain to describe a sound, but it is clearly missing and not firing on some trigger pulls. It is kind of like the sound when I first gas it up. When I shoot deliberate with the trigger again it shoots fine.
Am I "shortstroking" (is that possible on a mag)? Is this just totally not normal?

[Watcher]

It is possible that you are short stroking. It will make a "chuff" or a "tsst" sound if you do. It can happen if you don't fully release the trigger but it should be difficult to do.

Try this, take the valve out (degassed) and pull the brass on/off out. It'll be on the bottom of the valve and should look like a brass square with a pin in it. It should just pull out with your fingernail.

In the hole is an o-ring. You may need a pick to get it out. It may be worn out and need replacing.

If it is fine, just put a few drops of oil in the ASA and dry fire it a whole bunch. It could be that the valve was just dried up and needed to be "unstuck".
That could account for the suction pop it makes when you take the bolt off, I can see a dry o-ring doing that...