Open chamber WE M4/Scar/PDW/G39/l85

[T@NK]

I personally would stay away from any 6.01 on WE OB system, myself had experience of dirt and other stuff get into the chamber while I was crowling and caused jamming after. other words, dirts are easier to get into you TB barrel in OB system, and TB barrel are easier to get jammed.

[Quote]

Originally Posted by Kos-Mos

No, you can install any barrel you want.

BUT I would stay with 6.03 and above. Tighter than that brings FPS up and accuracy down.

Originally Posted by T@NK

I personally would stay away from any 6.01 on WE OB system, myself had experience of dirt and other stuff get into the chamber while I was crowling and caused jamming after. other words, dirts are easier to get into you TB barrel in OB system, and TB barrel are easier to get jammed.

Those are all things I'd like to avoid, especially because I'm extending the barrel to help increase overall accuracy as well.

Thanks you two!

[Huron]

My M4 seems to be pushing BB's too far into the chamber.. If the hop-up is turned down too much (to the point that .28's don't arc up, not all the way off), BB's fall out of the barrel when pointed down, or fire out of the gun at a severely reduced (read: useless) speed. This is using a Modify VSR bucking (http://www.wgcshop.com/wgc2008/main/...fy&catid=&cat=), not sure if that has any bearing on it.

[Fox62]

Originally Posted by GabeGuitarded

My M4 seems to be pushing BB's too far into the chamber.. If the hop-up is turned down too much (to the point that .28's don't arc up, not all the way off), BB's fall out of the barrel when pointed down, or fire out of the gun at a severely reduced (read: useless) speed. This is using a Modify VSR bucking (http://www.wgcshop.com/wgc2008/main/...fy&catid=&cat=), not sure if that has any bearing on it.

That's an excellent bucking for OB guns. You're using green gas, right? Your bucking's probably a bit lubed and BB's are just sliding by. I've had the same problem on a pistol that shoots beautifully (human sized at 170ft., with only 280 FPS!), just leave that extra hop up on and you should be fine. Not sure if other people know of a fix for this issue?


Fox.

[MaybeStopCalling]

I have a modify bucking in my carbine too, I've noticed it seats deeper than the stock WE bucking, but so far I haven't had an issue with it falling out. In fact, I've had the opposite issue of being unable to unchamber a BB when unloading.

[Ozone06]

Hmm I've been having issues with OB we with Double feeding. It Shoots fine for 3-4 rounds then a BB gets chopped and one gets stuck in the outer ring of the nozzle.

I was talking to t@nk about it and I loc-tited the back pin for the buffer spring but it still happening. I lube up my gun pretty well but I'll strip it down and try again.

[Kos-Mos]

Originally Posted by Ozone06

Hmm I've been having issues with OB we with Double feeding. It Shoots fine for 3-4 rounds then a BB gets chopped and one gets stuck in the outer ring of the nozzle.

I was talking to t@nk about it and I loc-tited the back pin for the buffer spring but it still happening. I lube up my gun pretty well but I'll strip it down and try again.

How old is your mag?

Your feed lips might simply be worn out.

[Huron]

Originally Posted by Fox62

That's an excellent bucking for OB guns. You're using green gas, right? Your bucking's probably a bit lubed and BB's are just sliding by. I've had the same problem on a pistol that shoots beautifully (human sized at 170ft., with only 280 FPS!), just leave that extra hop up on and you should be fine. Not sure if other people know of a fix for this issue?


Fox.

Running CO2, switching to GG/propane soon though. No lube in the hop-up. If I turn the hop-up high enough to hold the BB's, my gun is useless. Unless I have completely unfogged eyepro and my taclight on, I'm gonna have no idea where my shots are going and no first shot accuracy. Maybe I'll have to switch to .3's.

[Ozone06]

Originally Posted by Kos-Mos

How old is your mag?

Your feed lips might simply be worn out.

I'm running CO2 and maybe 4 mags through each (I have 12 and rotate them) I'll post pics of the mag lips when I get home.

[Kos-Mos]

Originally Posted by GabeGuitarded

Running CO2, switching to GG/propane soon though. No lube in the hop-up. If I turn the hop-up high enough to hold the BB's, my gun is useless. Unless I have completely unfogged eyepro and my taclight on, I'm gonna have no idea where my shots are going and no first shot accuracy. Maybe I'll have to switch to .3's.

Well, there is something wrong... since I am using exclusively .28s and the hop-up is almost at full with the stock rubber...

You are better take it apart and find the issue than applying a band-aid and break something else...

[Huron]

Is there silicone oil on your rubber? Mine is dry, and the Modify rubber is pretty soft (designed for 300-340fps judging from the charts Modify provides). However, I am shooting slightly less than that so I don't see why I would be over-hopping.

[Eien]

Just wondering if anyone had a issue with their m4 outer barrel curving up a bit? Not sure if it's my eyes or not but mine is like that for some odd reason.

[Fox62]

Originally Posted by GabeGuitarded

Is there silicone oil on your rubber? Mine is dry, and the Modify rubber is pretty soft (designed for 300-340fps judging from the charts Modify provides). However, I am shooting slightly less than that so I don't see why I would be over-hopping.

Eh, forget about the hardness of buckings. SO many soft buckings made for high powered guns. Take the Modify and Nine Ball, both are made for the VSR which is usually taken from 450 to 600 FPS. I've run my Modify bucking on my SCAR for about 6 months, and it's shooting at around 500 FPS.

I don't have a WE M4, so I can't really help you more than what I suggested, as I've never heard of this happenning on the SCAR.


Fox.

[BG.Ghost8]

Hey everyone!

Does anyone know the approximate height or amount of turns (from the closed position) of an open bolt NPAS adjustment, to get a we scar to shoot at 350 fps with .2's for chrono?

As well the inner barrel is the stock CQC one and using propane.

Any help is appreciated!

Thanks!

[Kos-Mos]

You know that this is based on temperature and altitude right?

I will check what my rifle is set tonight, at least you will have a guideline.
Keep in mind that 1 turn = 50 fps (at least in my rifle, I had to open the valve 1 turn to go from 340 to 390)