Hi guys, from the UK and just purchased this gun. Good to find a forum topic on this baby. Just installed the ra-tech inner barrel and hop rubber. Bought the kjw m4 npas kit as apparently it fits. But this is my first gas gun so no idea how to install it yet. Will be interested to see if it fits.

been fiddling with mine today. Did afew mods to make the barrel more secure.

Iv also been doing more chronie tests, im getting interesting results with the tb and ra hopup. seems to not be breaking 400. If this is the case this is great news for me for gaming. but it could also be cold propane.

I Installed the KJW M4 Npas kit inside my 10/22 and from what i can see (I don't own a Chrono sadly so i cannot verify the fps) it seems to make a difference. I could see the bb dropping closer as i adjusted the screw inside.

Sounds like an airleak in the hop up to me.

^Been wondering if this would work.

Turns out the hopup rubber is just that stiff that it cuts down on my FPS, this would explain why my gun loves 36s so much.

makes it simpler for me as now i can game it at prz with propane and indoors at tac on dusters.

ill do some nice tests next weekend.

^I want to try the RA-tech hop up rubber. The stock one seems to be quite shit, well at least on mine. Doesn't want to work at all. RA-tech any better? What color is it btw?

The RA one is white and solid as a rock, It also has the bucking broken into 2 nubs as opposed to one solid one.

It works amazingly well but you will need to use a heavy BB with it. Like i keep saying Bastard .36s are the way to go with this gun with that rubber.

You could always try the old school coke can method?

That doesn't really show you much of anything. It's a very bad way of chronying.

Yeah I thought of it after I said it, and figured it's actually a bad way to do it. And with gas guns, it wouldn't really work.

Picked this up last week!
Just waiting on my order of mags to arrive so I can game this thing.

Super fun to shoot though!

mine should be in next week!

Pick up a RA tech rubber. Works way better than the stock piece. Also my fps dropped to about 400 which is no problem for me;)

ya that was my find as well, i will re chronie it with 36s this sunday. ill post my findings.

I think I'll have to pick up one of those RA-Tech hopup rubbers from Airsoftparts...