AOSC Forum Archive

Ok so here's the rundown. I upgraded my KWA CQB to shoot harder. Ive done tons of mods and have many hours spent tuning and tinkering but my FPS sucks.

I chronoed it with a Brand New GUARDER SP150 and it shoots 355 FPS. It's 352-355 extremely consistently, but shouldn't it be shooting harder with an SP150?
The air seal is good through the air nozzle but I feel I'm losing FPS somewhere. I have a cylinder with slightly less than a Mid-cylinder port and a 363mm prommy barrel.

I am using the stock KWA 2GX bucking, Flat hopped. Also, the hop unit is split version design. Should I modify the body to fit a one piece hop up and then use a Madbull bucking?
This would get me more FPS but would this get me to 500FPS?

What I really want to know is if 355 FPS is par for the course on a SP150 and a 363mm barrel.

Try using a different cylinder. Also, what bbs are you chronoing with?

I'm using .25's. What kind of porting if any do you reccomend?

Anything less than what you've got now. That CQB has some really, really, really deep ports. Way more than it needs. A Type 2 should sufficiently volume a 363mm barrel. My guess is that you're system is very under volumed, and it's really killing the fps output.

I have the same gun and did the same thing. All I changed was the cylinder and got up to around 375 with .25s. I'll see if I can find a pic of the one I used.

so should I go with a full volume cylinder or go with something like this? http://www.airsoftgi.com/product_info.p ... s_id=10004

Something like the link. The one I used had a larger port than thay

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