TM 5.1 gas spewing

[juicy]

Oh man, you've got your fair share of issues, don't you? I'm running my 5.1 stock right now, minus a Dyna piston head, Action hammer spring and KA air seal chamber - perhaps try removing parts until you can figure out what's making the difference? I did that the first time I installed a Dyna piston head and determined that the floating valve spring as provided in the package was too strong, so I swapped back in the old one and it worked fine. Of course, I got the answers I needed within 5 minutes of me figuring out what was wrong via trial and error... but hey - it was certainly a learning experience. Have fun, lol.

[turok_t]

So i think by trialing each part, i narrowed it down to the air nozzle.. i might just get a new SD one like one RM recommended..

In terms of the last bb staying in the mag and not shooting out, why do u think that happens?

[juicy]

Meh, I don't know. How long have you had your Hi-Capa? I'm just throwing random ideas out there, but could it be your hop up rubber (is this even what happens when a rubber wears down - I'm not sure)?

When I installed a Guarder loading muzzle for TM 1911's in my ex-Socom Gear, the nozzle extended too far into the hop up chamber, thus pushing each BB out of the barrel before it could be shot out via gas propulsion. When you rack your slide by hand to chamber a BB, will a BB roll out of your barrel, similarly to your video? I just sanded mine down by hand until I could rack the slide and have a BB stay stuck in the chamber, resting just on the BBU-side of the hop up rubber nub.

[turok_t]

Originally Posted by juicy

Meh, I don't know. How long have you had your Hi-Capa? I'm just throwing random ideas out there, but could it be your hop up rubber (is this even what happens when a rubber wears down - I'm not sure)?

When I installed a Guarder loading muzzle for TM 1911's in my ex-Socom Gear, the nozzle extended too far into the hop up chamber, thus pushing each BB out of the barrel before it could be shot out via gas propulsion. When you rack your slide by hand to chamber a BB, will a BB roll out of your barrel, similarly to your video? I just sanded mine down by hand until I could rack the slide and have a BB stay stuck in the chamber, resting just on the BBU-side of the hop up rubber nub.

actually, i tried just racking the slide back without firing, and the bb's just fall out of the barrel, which part of the loading nozzle did u sand?

[Thenooblord]

the front tip
i had to do that with my desert eagle as well

[juicy]

So this is a common problem, and I took the right course of action? (Please say yes haha)

[Styrak]

Originally Posted by turok_t

actually, i tried just racking the slide back without firing, and the bb's just fall out of the barrel

Sounds like you don't have enough hop dialed on.

[Slono]

Try setting your hop up to max, and clean your inner barrel and hop up rubber using your cleaning rod to rid the parts of any excess silicon oil. Mine leaked BBs because it was over lubricated in that area. Do whatever you can before sanding, because once you sand you can't reverse what you've done.

Also see if your nozzle sits all the way back on the blowback unit when you rack the slide. If its not settling all the way back what could be happening is that the "loading rod" is jamming into your hop up rubber causing the BBs to double chamber. If that's the case find out why its not sling shotting back into place.

Try the above things first to rule out any things that can be fixed without sanding.

[Shirley]

Have you even felt any gas coming out the inner barrel while shooting? Put your hand infront shooting blanks and feel if gas comes out?

[turok_t]

ok so here are my results. Ive tried just cocking the slide with a magazine in my gun, and each time i cock my slide, a bb drops out when i use EITHER the stock TM loading nozzle or the Airsoft surgeon loading nozzle (HOP UP SET TO MAX). However, when i actually shoot the gun, a bb shouts out when the TM loading nozzle is installed, not the AS.

Ive tried cleaning my inner barrel and hop up rubber and theres no oil or debree since these parts are new and just installed.

Also, the last bb still remains in the mag and doesnt shoot out at all with either of the loading nozzles above..

Shall i proceed with the sanding?

[Shirley]

There's your problem, it's the AS nozzle. Compare it to your TM, if it's too long.

[Daiviet]

Change out the nozzle. I've used a few different ones and I'm sticking with the Shooters Design one. The AS nozzle was giving me similar issues and I've since chucked it into the parts bin.

Also, you're using the nineball dyna piston head? I've heard of problems using that with propane, there's too much pressure and it blows out the oring. Switch over to the piston head that came with the AS nozzle if you're still using the stock blowback unit, or just use the lightweight one you picked up that I remember from another thread.

[turok_t]

Originally Posted by Daiviet

Change out the nozzle. I've used a few different ones and I'm sticking with the Shooters Design one. The AS nozzle was giving me similar issues and I've since chucked it into the parts bin.

Also, you're using the nineball dyna piston head? I've heard of problems using that with propane, there's too much pressure and it blows out the oring. Switch over to the piston head that came with the AS nozzle if you're still using the stock blowback unit, or just use the lightweight one you picked up that I remember from another thread.

Hey, actually, no im not using the nine ball piston head anymore.. i got a light weight cnc blow back housing that has a propietary piston head.. its the one that Brian is selling and its the same as the airsoft surgeon one...

Also, when i use my stock loading nozzle, my gun shoots fine until the last bb. This bb is is not chambered and sits at the highest spot in the magazine. I can pull the trigger all i want and the slide will cycle and gas will be released, but there is no bb shooting out. Usually when you fire your last bullet, your slide will be held back by the slide catch, but for me, it just keeps on firing because the last bb is not chambered.. Im not sure how to fix this problem since it has nothing to do with my AS air nozzle, this is the stock marui nozzle.

[Slono]

How much use has your magazine seen? Maybe the mag spring is worn and losing its bounce. With less BBs, there's less tension on it and maybe with only 1 BB in the mag there's not enough tension to push it all the way up to the top. Just a thought, I'm looking at my gun to see what else could be wrong.

[turok_t]

Originally Posted by Slono

How much use has your magazine seen? Maybe the mag spring is worn and losing its bounce. With less BBs, there's less tension on it and maybe with only 1 BB in the mag there's not enough tension to push it all the way up to the top. Just a thought, I'm looking at my gun to see what else could be wrong.

I havent used it that much.. I probably filled it up 25-30 times? Ive been trying to learn more about GBB pistols throughout this entire process. In order to chamber that last round, the thin flat piece on the bottom of the loading nozzle scoops up the bb, while the actual nozzle (on the loading nozzle) positions it in place in the hop up right? If this is correct, why is it scooping up every bb in the mag except for the last one? Can it be caused by the spring?