[FlyGuy]

Out of the box, a completely stock WA GBB M4 (if you can get one) is not overly skirmishable on anything but HFC. However, the G&P WOC M4 and/or upgrading the internal parts yourself will allow you to use propane just fine. The velocity of the gun will be determined mainly by the nozzle design and the barrel-to-bb match with a 6.01 giving you the tightest fit and therefore the highest velocity for a given puff of gas, but it may also be too tight for some brands of bbs. I use good quality ones like BB Bastard and have never really had any problems.

In my case, I happen to prefer the almost near-perfect realism of the inner workings (trigger group, bolt & bolt carrier, etc.) of the WA design but I will echo Shelled Pants' comments that the WETTI AWSS M4 (GEN 2) is a seriously sweet beast of a gun, and for a lot less cash than a tricked-out G&P/WA like the one I have. I had the chance this past weekend to compare it against mine and I'd have to say it's on par if not a little better, though the gas tube "plumbing" is highly visible inside the upper receiver when you rack the bolt carrier...a minor visual distraction on an otherwise superb piece of work.

If you're on a tight budget, then the AGM will (sort of) work for you but I would strongly recommend you save a bit more and try to obtain one of the WETTI versions, or save a lot more and go to town with an Innokatsu or WA/G&P version. It's up to you...


'Fly