G3-SG1 bbs hitting the outer barrel

[Hortons Heros]

When shooting the BBs are "dinging" off of the end of the outer barrel. A few shots will go straight then a few go flying off to the upper left. I'm talking like over 6 feet from the other BBs at 30 ft. I have cleaned the barrel more than once and was wondering how to fix this.

In my mind there is clearly something putting a crazy spin or knocking the BBs on a weird course, but to do it only every 5th BB or something like that is weird. I noticed that the inner barrel does not come all the way to the end of the outer barrel and actually hides about 2-3 inches into the outer barrel. I tried putting a 552 tightbore into it but no good. Anyway let me know what your thought are and if this is common.

Dave Horton

[Dro]

Did you try getting rid of the barrel wobble by taking off the outer barrel, and filling in the space with some paper?

[Hortons Heros]

I'm not sure what you mean. There is no barrel wobble. The inner barrel does not reach to the end of the barrel is all I really mentioned. Please explain.

[odp]

My 2 cents on it - try removing the outer barrel and flash hider and test your gun with a chrono. 2-3 inches of difference between the outer and inner barrels usually isn't enough to cause that kind of problem.

If it shoots fine and all shots are fairly consistent fps-wise, then your only recourse would be to buy a longer inner barrel and cut it to make up the difference.

[Cheesevillage]

If the tightbore didn't work, then maybe look into a problem with the hop up?


-Cheese

[pizzainthemorning]

He means there's a little bit of wobble between the inner barrel and the outer barrel (the one inside the gun that runs down the foregrip). If you take off the outer barrel (the real outer barrel outside the gun) and wrap the end of the inner barrel with some tape or something it'll make it a little wider, so when you reassemble it'll have no room to move anywhere.

In any case, I'd remove the inner barrel to take a good look at it, make sure there aren't any big gouges in it or nicks because there's quite a lot of open space in the outer barrel area so I doubt it'd be hitting that. Maybe try a few shots with the whole outer barrel off just to test whether it is the outer barrel.

Just my advice.

Alex

[Kid]

If you can shoot it without the outer barrel, give that a shot. Leave the inner in and just give it a go.

That will surely tell you if it is in fact the outer barrel causing the problem.



Could then be solved just by sanding, an extended barrel, etc.
It doesn't sound like it could possibly be the barrel.

Hop-up isn't really likely either.

[pizzainthemorning]

Ok, I've attempted to attach a pic which should explain what I mean. A sig barrel may be even worse. As was mentioned, possibly the hop, but this is what I mean about the barrels.

[Hortons Heros]

that makes sense now. I really do doubt that is the problem but I'll give it a shot and thanks for the drawing. There is tonnes of room inside the outer barrel and the inner barrel seeem to fit pretty tight.

What i meant with the tightbore not working was that it was too long and would not fit all the way down the outer barrel so I couldn't put the gun back together to try it out.

After I cleaned the barrel when I look down it ( that sounds so dumb, just the barrel attached to nothing with a light shining down it.) there seems to be a few nicks so I'll try another inner barrel from another gun. Thanks for the posts guys.

[Kanyon]

You should know that the outer barrel of the G3 is tapered towards the end near the flash hider. Anything longer than 469mm (the length of the regular inner barrel) will not fit. So it's not a problem with the inner barrel, it's simply the design of the outer barrel why your tightbore won't fit.

[Hortons Heros]

that's what I figured any way. Is that really the stock length of the barrel. May be I'll measure it and see if my barrel is short, perhaps there's the problem.

[Hortons Heros]

barrel was the proper length, I took the front end (flash hider and outer barrel off) piece by piece and tried firing it. I guess the allan key screw had been over tightened on the same spot to many times so it was tilted a bit. The shots were scraping off of the inside of the barrel and hitting the flash hider. Thanks for all the help folks. Problem solved.