KWA LM4 NPAS Help!
 

Hello all, I'm trying to install the RA Tech KSC/KWA NPAS in my LM4, but I've already hit a snag: the oring located at the back of the nozzle, where the small c clip locks in place is too large. As such, I can't get the c clip on. I'm looking for anyone who has done this modification to let me know how they dealt with that o ring. Thanks!

All I did was push REALLY hard up on the nozzle and got a friend to push the C clip in!
It took a lot of force and my hand had a nice indent on it.. But I got it in!
After a few mags through the oring will compress and kind of cut off the excess.
I took mine out for an inspection and a piece kinda peeled off. Since that part came off it goes on really easily.

Once you get it in. Does the loading nozzle o-ring the one that 'plungers' in the bolt stick? My nozzle doesn't have that snap back into the bolt like the stock one.

Just curious how urs fits!

Thanks for the info! I didn't have a second set of hands available, so I actually just took the oring off. :p seems to still work fine. My new bolt seems to cycle well, I added some silicone oil to the bolt before I installed it though. That might help, if you haven't already done it. Other than that, I found the set screw in the side of the nozzle catches slightly on that small tab that keeps the whole thing in place, but it still cycles fine, and I imagine that set screw will wear down in a bit. The only thing I could think of for your problem is to try to find a thinner oring.

Glad you got it on!
Yes I was considering replacing it or putting the stock one back on! But I'm too scared of tearing it while getting it off so it will do as is

I think if your careful, you'll be okay. Orings are meant to stretch, but if you gun cycles fine as is, then your probably good to go.