WE Gas Blow Back M4A1 Carbine

[weekenny]

Cheers guys will take it to bits soon and post again.

[Bjerhof]

I've run into a bit of weird problem with one of my CO2 mags for my M4.

The last few games one of the magasines have been a bit hard to get out of the magwell but for some reason it's now even harder to get in...actually have to slam it a few times to get it in there and it's almost impossible to get out again.

 

I've compared it to my other mags and it dosn't seem like theres any difference physically but can't figure out what else it might be...anyone had a problem like this?

[carabinero]

I was at my local "swap meet" bought a single VN mag to try it out...

HOLY ######, it's so much better

no wonder people were demanding for new version of Open Bolt M4 mags.

 

The cool-down effect were so much more tamed.

If there's MOLLE pouch for Short M16 mag I would switch to the 20 rounder instead.

 

Hi there, in terms of Blowback, recoil and cycling, How do you felt the 20 rounder compared to the old 30 rounder? I'm curios about the new valves being used by the newer one...Thanks

[danielsilva]

There's no difference in terms of blowback/recoil/cycling, the VN mags do behave better in terms of showing cooldown though and even when completely frozen they still function without spilling all the gas they have. The downsides are gas capacity and they will get too cold if you reload them more than 2/3 times.

 

Regarding the pouches i just use regular pouches and stuff something in the bottom to make some height.

Edited November 7, 2011 by danielsilva

[ODA15]

I've run into a bit of weird problem with one of my CO2 mags for my M4.

The last few games one of the magasines have been a bit hard to get out of the magwell but for some reason it's now even harder to get in...actually have to slam it a few times to get it in there and it's almost impossible to get out again.

 

I've compared it to my other mags and it dosn't seem like theres any difference physically but can't figure out what else it might be...anyone had a problem like this?

 

If you separate the upper/lower receivers, does that magazine fit normally into the lower receiver okay? No issues inserting/releasing it?

Edited November 7, 2011 by ODA15

[Bjerhof]

I won't even go that far unless I give it a few good taps, that's the weird part.

[danielsilva]

Why don't you put some chalk ( or something that rubs off easily ) on the mag, insert and remove and then see where is it rubbing.

 

You didnt answered that last question though, does the mag enter freely if you separate the lower from the upper ?

[Bjerhof]

Well what I meant to say was that the mag can't get in far enough for the upper reciever to be a problem, it'll only go in up til the notch for the mag catch, so just a few centimeters.

[ODA15]

Well what I meant to say was that the mag can't get in far enough for the upper reciever to be a problem, it'll only go in up til the notch for the mag catch, so just a few centimeters.

 

Well, at least you know that the issue is now not the top plastic part of the magazine that touches the nozzle, but the body itself. I'd do what danielsilva suggested and try to mark (with chalk, graphite, etc) the body of the magazine (approximately the top 1/3 or so) and then insert it into the lower receiver. This it'll let you know where exactly it's rubbing/catching.

 

It could be that the magazine has just expanded for some reason. It wouldn't take much to make the magazine not fit, either. Just a couple of millimeters worth of expansion.

Edited November 8, 2011 by ODA15

[ODA15]

- Sorry! Double post!

Edited November 8, 2011 by ODA15

[kullwarrior]

Question what is the lowest temperature you guys game with your Open-Chamber M4?

 

is the co2 worth the trouble? (heard a lot of complaint on leaky co2) or is it simply better just run 20 rounder (seems to me 20 rounder can work at lower temperature than the gas 30 rounder)

 

Price wise...(Using RA-tech since they have the lowest price I've seen)

 

Open Chamber CO2 30 rounder $44USD/mag

Open Chamber Gas 30 rounder $32USD/mag

Open Chamber Gas 20 rounder $30USD/mag

 

Anyone have all three can give some insight?

 

I'm considering gaming with my GBBR in this late season (temperature is around -5C to 5C in Edmonton right now)

From my own experience, I wouldn't want to use the shell-base mag in cold due to the fact it will spill liquid way too easily.

Debating between CO2 30 rounder (suck up to $0.50/ 12g) and buy an extra set of 20 rounder and use propylene in winter (obviously it won't work -20C, but -10C might be possible)

Edited November 9, 2011 by kullwarrior

[danielsilva]

I would say that if you're a conservative player using co2 might be beneficial but if you play use other very short and spaced bursts, imho its not worth it.

 

Last year or so I went to a game in the Czech Republic and took my CB WE M4 with me, since it was cold there ( -5 at one point ) I tried to use my co2 mags but after a few hours I had to switch to propane cause the low temps and high humidity kept freezing everything, at one point I had to hammer down the carrier forward since the water froze from the co2 and the carrier got stuck.

 

The co2 mags are more maintenance free but if you live in a cold and wet area, the co2 might create more problems than fix things. I sold all my co2 mags and bought VN mags instead.

Edited November 9, 2011 by danielsilva

[weekenny]

OK chaps had a look at the M4 with full auto problems.

 

I screwed down the buffer retainer was way far out and the manual cycling is much better and semi works most of the time.

 

Now its running open bolt Co2 and the kick is um lame. Also the gas efficency is horrific. Now the bolt how do I take it to bits? I've checked anf the nozzle moves and returns fine on its spring so that's ok but I'd like to poke about inside the nozzle the other brands nozzles KJW & WA come to bits does this one??

 

 

Cheers

[weekenny]

Update the sear part #48 was bent out of shape from incorrectly fitting an Ambi Selector the leg that runs to the selector was bent at almost 90 degrees. I reshaped it and the semi function is now ok.

 

However two new things (maybe not new I just didnt notice till testing) the selector can go safe/semi/auto even when not cocked, its a new trigger box that was fitted when the open bolt was done so I've rulled out wear and it doesnt fire on safe so I don't think its a cracked trigger. Is it possibly the ambi selector is out of spec since its aftermarket?

 

Second thing it vented when I tried auto and I have no more Co2 at the moment, so not sure if it was just a fluke.

[NonEx]

The no safe when not cocked issue is a non issue, it happens unfortunatly and it is a feature that you cannot expect nor rely on to work properly, not out of the box or after use.

[weekenny]

Ok cheers dude, I figured as much.

 

I'll get more Co2 and test the auto again.

[ollie_ty]

Hi guys I'm thinking about picking one of these up, and wondered if you could answer a few questions:

- From what i've read, buying the RA tech custom WEM4 would be a bad idea, and I should just get a standard OB WEM4 instead. Is that right?

-What are my choices regarding upgrades externally? Ideally I'd want a VIS2 upper receiver, is this possible? Also, Weekenny had problems with an ambi selector. What ambi selectors are compatible with the WEM4?

[Jimmypie]

VIS2 =Yes

 

 

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[NonEx]

What brand VIS2 is that ?

[Jimmypie]

That photo is from the beginning of the year, when I first got it, had a few outings but not many.

 

Edit, Dytac if i recall correctly.

Edited November 26, 2011 by Jimmypie

[Jimmypie]

Edit. Dytac If I remember correctly

[kullwarrior]

Hi guys I'm thinking about picking one of these up, and wondered if you could answer a few questions:

- From what i've read, buying the RA tech custom WEM4 would be a bad idea, and I should just get a standard OB WEM4 instead. Is that right?

-What are my choices regarding upgrades externally? Ideally I'd want a VIS2 upper receiver, is this possible? Also, Weekenny had problems with an ambi selector. What ambi selectors are compatible with the WEM4?

 

 

WHAT?!?

I run a RA-Tech Custom WE M4 with RA-Tech steel bolt carrier, its great

 

If you want to cheap out and end up having a broken gun 8-12k down the round then go with standard WE M4

 

Its true there's better manufacture for some parts (CWI's hammer, and PDI inner barrel for example)

 

however, to get OOTB working one, I'd go with RA-Tech Custom. Make sure you get the steel bolt carrier as well so that the steel firing mechanism won't destroy bolt carrier.

[intinerious]

VIS2 =Yes

 

 

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Nice M4

 

Got a quick question for you, how are the ARC magazines? I can't seem to find a review for them anywhere and I found a report on another forum that the ARC mags don't allow the propane bottle nozzle to reach into the mag valve.

 

Also, did you have to do any filing work to fit the mags, and do they allow you to drop-mag multiple times without damaging the internals of the mag? I'm planning to outfit all my WE M4 mags soon for my SCAR and my upcoming M4 project and I'll like some feedback for the mag shells, thanks!

[Jimmypie]

Fit is perfect,in both my SCAR's and M4, no mods required.

 

yes the fill valve is set about 5-7mm deep, so i use an extension for the gas/propane bottle, a standard green gas bottle nozzle wont reach, AI propane adaptor does though.

 

I wouldnt like to say on "drop-mag" testing, but they are tough and very sturdy.

[intinerious]

Fit is perfect,in both my SCAR's and M4, no mods required.

 

yes the fill valve is set about 5-7mm deep, so i use an extension for the gas/propane bottle, a standard green gas bottle nozzle wont reach, AI propane adaptor does though.

 

I wouldnt like to say on "drop-mag" testing, but they are tough and very sturdy.

 

Thanks for the info! Mind linking the adaptor for me (for the longer gas bottle nozzle; I haven't come across any in HK and I don't think it's a common airsoft item here)? I won't be getting the AI propane adaptor as nobody has access to propane bottles here in HK, I'm stuck with Top/Red/Green gas at the moment.

 

Actually would it be possible to drill the hole a little bigger so that the larger end near the very ends of the top gas bottle nozzle be able to fit through the mag shell to push against the fill valve? I'm thinking if it's possible to do so the only issue I might have is a weaker bottom on the mag since I've decrease the mag shell's structural rigidity.

 

Thanks for commenting on the durability of the shell too, regardless of whether you can comment on whether it's 'drop-mag durable'