We can't answer if you don't give us something to work with. Have you made any changes to the gun other than the spring? How long did it take for the fps to drop? Was it gradual, or all of a sudden? Could you give us a clue as to what rifle it even is?

And not to be a total jackass, but could you please fix your grammar? We have a lot of people who don't speak English well, and even if we didn't, it's just easier to understand people when they don't use text talk or bad grammar.

 

It sounds like your just not getting a good airseal. Take out the magazine, pull back the bolt, push it forward like you normally would. Turn the gun upside down and look inside the mag well and find where the bucking meets the end of the cylinder. Look to see if there is any sort of a gap there. I would bet that this is your problem.

I would check to make sure your spring guide is screwed together all the way. It seems weird, but if it comes unscrewed just a little bit, it can sometimes keep your bolt from moving all the way forward.
Also, check to make sure the trigger is mounted correctly) and as far forward as possible.

 

Thanks

Thanks but nothing worked. I'm just going to buy a laylax m170 spring and call it a day. I have no idea what it could be besides the spring. One thing I changed was the bucking and I did a TDC mod thanks to some of you. I also changed the inner barrel to a 6.01 500mm. So tell me what you guys think I should do. I have heard bad things about the ac springs but that was after I bought it. Thanks guys and I'm sorry I used the text short word stuff. The guns a jg bar 10

 

Double check your bucking. I bet that's the problem.

 

When you say the fps is "nothing almost", are you serious, or are you exaggerating (50fps vs 300fps)?

Time to check your air seal. Take the barrel off so the cylinder is showing through the receiver. Put a finger over the cylinder head nozzle and shoot. If no air comes out you have a perfect air seal. If it takes longer than a few seconds for it to drain it is fine. If it all empties out within a few seconds, you have just figured out the problem.

If you don't have a seal problem in the cylinder, put the barrel back on and put a finger over the end of the inner barrel. Do the same thing that you did with no barrel on. If the air escapes quickly, then the problem is in the hopup area.

If you have a good overall air seal, then the problem is with the spring.

 

Have you cleaned the barrel?

Is you hop turned is too high so its kind of jamming? That's possible with a tdc mod. Turn it down or take that off and put the original part back on? start with the simplest things, especially if they wre free.

What is the a actual fps now? 450? 200? 50?

Have you checked the o ring on the piston isn't sliping off or that the spring guide hasn't come unscrewed?

 

I agree with these guys, its gotta be something that was recently changed. Airseal or bucking. Its hard for us to pinpoint without actually having the rifle. It can be anything from the o ring on the piston, to the bucking on the hopup. Thankfully it can only be a few things, and should be easily solved.

Test it like Juggler mentioned first. Sounds like a bad air seal in the cylinder, but its possible that the bucking is leaking but that would be a "less noticeable loss" as with a loss in the cylinder, it would be more noticeable.. I have a video in my M28 pistons thread where I show the compression test Juggler is talking about.. I can hold the air nozzle shut, and fire the rifle, and I can keep compression for however long I hold my finger over the air nozzle..Thats what you should have also.. if it leaks, then its either a faulty o ring on the piston, or an air loss in the cylinder head threads..


Only other place that could leak air would be where the air nozzle meets the bucking, or where the bucking ends at on the inner barrel. Thankfully spring rifles are a bit easier to tinker with lol..

 

Ok ill try all of those things

 

My gun is still not shooting as normal. I tried every thing that I know of.

 

Did you get a new spring?

 

What were the results of the compression test I described?

 

Well it might be the bucking because when I pull the trigger with my finger on the end of the barrel it shoots out air were the bucking is. And when I put my finger on the end of the cylinder it takes it about 20 seconds to empty. So i don't know and no I have not gotten a new spring. No one has them in stock I want a laylax 170.

 

What ever it is its getting worse every time I shoot it. So it might be the cheap spring. It was shooting 500 fps and now it's shooting maybe 200. Is there any other spring brand that makes a good 170

 

Is this what your looking for?
Buy Laylax PSS10 170 Spring for Marui VSR-10 series-Springs / Spring Guides - Rifle & other Airsoft gun accessories at redwolfairsoft.com

 

Yes but isn't red wolf in Asia.

 

Yeah, I don't know about the shipping prices/time it takes to ship. Just wanted to give you an option, in case you live in Asia.

 

Ya evike did have it but out of stock like every thing else. Which bucking would you have me get. Thanks for the spring thing.

 

Assuming you have a vsr10 (sorry if you already mentioned that, I wasn't reading very clearly) I found one on evike for a great price and I can vouch for angel custom because I have parts from them that work flawlessly.
Evike.com Airsoft Guns - Internal Parts | Evike.com Airsoft Guns - Hop-Up | Evike.com Airsoft Guns - *Hop-Up Bucking | Evike.com Airsoft Guns - Angel Custom "Elongated" VSR-10 Airsoft Sniper Rifle Hopup Bucking (For Angel CNC VSR-10 Chamber) |
Hope this helps, I'm not the best with vsr10 internals, I'm and aps2 guy!

 

The spring I have is angel custom and I do like their parts but the spring is half the size of when it was new. I need a laylax ill just use my aeg at my next meet. The angel custom bucking ripped but I do have their zero trigger and every thing else angle custom. But thanks for looking.

 

Sure. Sorry about the bucking, but at least it's not the most expensive thing to break!

 

Ya that's true

 

This may be a stupid question, but when's the last time you lubed your piston, and what do you lube it with?

 

Last week and cylinder lube.

 

I have a youtube video showing my compression test. My youtube channel is Rangerscustoms

When I have the barrel off of the receiver I pull the trigger and have my finger covering the air nozzle. The piston hardly moves, you dont hear any clunk sound really. The air cannot escape anywhere so the piston cant move. I can hold the air inside the cylinder for however long I hold my finger over the air nozzle.

If your test is not similar to mine, then you need a new o ring. Also the lube can make a difference. It cannot be petroleum based grease cause that will eat the o ring away. I use a #13 sized o ring on my pistons, the bar 10 stock piston might use a #14

If you are able to take a video of your test, please do, and email it to me, or post it to youtube and send me the link so I can see and hear it.

Sorry it took so long to get back to you, I have been having severe sleep issues lately and have been taking sleeping pills,lol.. kinda leaves me in a slight zombie state haha..

The spring your using also should not be shrinking either, thats not a good thing. I have been hearing Angel Customs parts are a very low quality but some say they are good. I dont know cause I havent used them. Also, you can take a shoe string and tie it to one end of the spring, and get something thats about one or two pounds and hang that from the other end of the spring.. this should stretch the spring.. Should buy you some time till you get a new one..

Do not try to stretch the spring by hand cause it could make it have a curve to it, and that will cause a rubbing/grinding inside the piston.

 

Ok I'll try the new oring and ill mess with my spring thanks guys.thanks a lot ranger. And will a laylax 170 get smaller as you use it like the angle custom did. Because I need right around 500fps on my feild. Should I get a 150 then or will it get weaker after its used.