Propane vs CO2

[Jo_Canadian]

I recently picked up a gbb pistol (KJW KP-06) and it came with a CO2 mag.

Now after some research I'm decently sure that it will accept propane and the CO2 mags without any internal modification needed.

My question is which is better, has a higher FPS more shots per mag, maintenance and so forth.

Is it worth buying more CO2 mags or should I switch to propane. Is one better for indoor than the other?

[L473ncy]

CO2 is guaranteed to shoot too hot for indoors and if you're playing outdoors and need a sidearm for below MED definitely not able to use it. CO2 has higher pressures straight up. Because of those higher pressures it might put more stress on the gun. However it does have higher FPS and more shots per mag (probably about 3 mags worth before needing to change the canister), it also doesn't really suffer from cool down effect as much.

[targetGspot]

If it's setup for Co2, I'd just run with Co2, unless you need to drop fps for field limits. Propane will likely give you less fps, and sometimes especially in cold weather,(Jo Canada) your gun won't cycle properly with it. The thing I do like about propane mags is you can add gas between rounds, (if you play shorter games) as to not run out mid mag.

[Jo_Canadian]

The gun itself is full metal so I'm not to worried about undue stress. So my best option is to grab a couple of each and switch out based on game type, MED, and field?

Thanks guys that does clear up a few questions. Now to find some TM ones in stock somewhere.

Also TGS, I'm in your town right now, (just got here I'm a vendor at C4) and I can tell you its a fuck ton colder here than in Toronto.

[ShelledPants]

The KJ 1911 series are really quite good. I regret selling mine. The c02 system is hotter than the propane system. but it should take TM propane mags no problem, mine did.

[L473ncy]

Just for reference, TM doesn't make CO2 mags. If you notice with TM pistols they don't have that circular cutout at the bottom like the KJW's have for fitting in the extra dimensions of the CO2 capsule. Also they're a Japanese company and they need to follow the laws there. However you can use TM Greengas mags in a KJW and vice versa.

[Jo_Canadian]

I meant the propane mags that TM makes. Im gonna have to do some hunting for the KJ CO2 mags

[redzaku]

ehobby asia is where i go for magazines for my kj works M1911a1
i think you should stick to CO2 because i ran into problems running propane but fixed it when i transplanted the nozzle from a kjw 1911 MEU, that was designed for green gas
the CO2 nozzle is much more oval and that caused sticking and less shots with propane, well in my case of course

[ShelledPants]

TorontoAirsoft also has lots of KJ mags.

[Styrak]

Originally Posted by Jo_Canadian

I meant the propane mags that TM makes. Im gonna have to do some hunting for the KJ CO2 mags

I have KJ mags:
http://sasksoftarmoury.ca/index.php?...roducts_id=337

http://sasksoftarmoury.ca/index.php?...roducts_id=338

And TM mags:

http://sasksoftarmoury.ca/index.php?...roducts_id=413

Originally Posted by Jo_Canadian

The gun itself is full metal so I'm not to worried about undue stress.

It's not the metal that's the issue. It's the internals, specifically the plastic nozzle and valve inside.

[p0nch3]

The kp06 has been my workhorse pistol for a while now. It was the first one I got. I don't know if it's just mine but mines been really finicky since I started messing around with internals. Anyway back to the OP, CO2 and propane are perfectly okay in it. But the main concern here is whether you'll be playing indoors or outdoors. Consistency wise, CO2 is your best bet. But it will shoot really hot for CQB(my clocks at around 400fps on co2). Propane/GG puts it pretty much safe for indoors but the efficiency on the pistol is just terrible. It's only about a magazine and a half on propane, and I think it's also the similar on co2. Blame the hefty slide for that.

All in all, I would recommend getting propane mags just so you can have a bit more versatility. The length of the inner barrel makes it still effective at that FPS for a little bit longer distances so you shouldn't have too much issue taking it outside.

[Styrak]

You only really need it to reliably fire 1 mag's worth of BB's.

[Sherbert85]

I just got the co2 m1911a1 from 007 and ken is selling "propane kits" for the kj pistols. basiically two softer springs and a replacement bucking. Is that even needed then?

[Styrak]

Not needed but you can put it in if you want.