Airsoft Canada - View Single Post - FAQ for Tokyo Marui Hi-Capa, 2011, 1911, MEU & Detonics type variants

ichimaru gin · July 11th, 2011, 10:06

Hi guys, I had my TM hi capa chronoed today and the result was quite unpleasant. It was clocked at 303 FPS using red gas and 0.2BB; 260 FPS using the same gas and .25 BB. You can all ignore the red gas and assume it was green gas because I was quite sure that I got ripped off by the "red gas" label.

Here is my internal setup
CP blowback housing (comes with piston head)
SD POM nozzle (Keep the marui floating valve and spring)

At first, I was suspecting leakage. But I dont think it is the case since my gun can shoot through 36 rounds of BB using hi cap 4.3 mag.

I tried doing the plumbing tape mod to the inner barrel and FPS still goes the same.

What could have caused this?
My standard hi capa was clocked at 315-320 FPS using green gas (that was 2 years ago). And now after I upgraded the internals, FPS is going down.

One thing I realize before changing the TM BBU with a CP one was :
With a mag installed, The nozzle would stick halfway when I try to rack the slide and then it would snap back to its battery position by the force of the nozzle spring.
WIth this in mind, I could conclude the sealing between mag lip and nozzle was tight.
But now... after I installed CP BBU, the nozzle was not sticking at all.

Could this be the cause of the lost FPS???

July 11th, 2011, 10:06	#1174
ichimaru gin Trader rating Join Date: Sep 2008	Hi guys, I had my TM hi capa chronoed today and the result was quite unpleasant. It was clocked at 303 FPS using red gas and 0.2BB; 260 FPS using the same gas and .25 BB. You can all ignore the red gas and assume it was green gas because I was quite sure that I got ripped off by the "red gas" label. Here is my internal setup CP blowback housing (comes with piston head) SD POM nozzle (Keep the marui floating valve and spring) At first, I was suspecting leakage. But I dont think it is the case since my gun can shoot through 36 rounds of BB using hi cap 4.3 mag. I tried doing the plumbing tape mod to the inner barrel and FPS still goes the same. What could have caused this? My standard hi capa was clocked at 315-320 FPS using green gas (that was 2 years ago). And now after I upgraded the internals, FPS is going down. One thing I realize before changing the TM BBU with a CP one was : With a mag installed, The nozzle would stick halfway when I try to rack the slide and then it would snap back to its battery position by the force of the nozzle spring. WIth this in mind, I could conclude the sealing between mag lip and nozzle was tight. But now... after I installed CP BBU, the nozzle was not sticking at all. Could this be the cause of the lost FPS???