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Gas Powered Guns / Re: Just got new KWA LM4 - need help choosing proper parts - only the best! :)
« on: January 31, 2017, 01:22:54 PM »Hey, I am actually looking to buy one of these down the line and this is great info! The only contribution that I have to to say that RATech has been around a long time and although I haven't personally tried 'em I have always heard people bragging about the RATech parts they have in their gas guns.
Well because you are going to get an LM4 I'll fill you in on some things I have learned so far.
I bought the Ra Tech 6.01mm tightbore barrel and hop up combo. The Hop up is the EXACT SAME AS THE STOCK KWA UNIT. It is not an Evo II. I do t even know if it is a Ra Tech. I mean, everything is the exact same. NONE of the visual differences between the OEM hop up and the Ra Tech/Maple Leaf are there. Nothing is silver (stainless steel), the tensioner also is t the same shape as any of the Maple Leaf ones. I just ordered a Maple Leaf Evo II 80 degree hop up. I wanted a 75 degree but I can buy that bucking later. This kit comes with the evo 2 bucking, steel sleeve that goes over the bucking, and steel evo 2 style tensioner. I have high hopes. I'll let you know after I use it at Fightertown this weekend.
The jamming issues were likely from bbs that were too soft. I only use Elite Force now. The newer LM4s already have that notch in the inner barrel and a c clip stock from the factory. I noticed this when I took it apart to install the new barrel. BTW, when you first get the outer barrel off, if you cut the gas tube down a little bit, you can then access the hop up and in effect barrel easier in the future. You have to remove the muzzle brake, front sight, and sling swivel. The gas tube keeps the barrel nut and delta ring from turning until it's out. So now I can remove the outer barrel without removing all those parts. You'll understand when you take it apart the first time.
BTW-the guys at US Auto Weapons (has new name now, literally next door to Scottsdale Gun Club) loosened the barrel kit for me. I did t want to have to buy an AR armorers tool and an upper receiver vice. Now I just tighten it up until it's tight, but not overly tight. Saved myself a bunch of money in tools.
Also, I chrono'd too high on Sunday. It was 392 two Saturdays ago, 340-360 this last Saturday, and 412 the next day on Sunday. I put a DangerWerx CQB flute valve in it that I had modded a little the Friday before. It went from 412 to 388. I don't have a chrono so I didn't want to file it too much. I guess I did great though. You just file a little material off of the flat part on the back of the valve. Be sure to keep it even though or it will vary shot to shot a whole lot as it spins. I didn't take very much off at all. I just didn't want it to drop the velocity 60fps like I have read it does. I knew that if I needed to drop the velocity for Fightertown I would only need a reduction of 20-30fps.
Anyways, I'll post more to this as I try different things and let people know how they work out. I'll be at Fightertown on Saturdays 99% of the time and Sundays maybe half the time.
Oh, my future posts to this will be under my screen name "Mr. Joseph" from years and years ago. The administrators are going to help me get access to it. They already tried but the password didn't work. So any day I'll be posting under that screen name.
Later guys! I am so happy to have my favorite hobby back again!