pressure plate inside dump chamber?

[Rokudon]

oooooook second post within 24 hrs, this thought has been bothering me for a while too. i've read other threads talking about mag efficiency and potentially wasted gas within the dump chamber. i've been thinking in my spare time (i'ma weird kid, anyone who knows me will agree) would adding a presure plate inside the dump chamber help in any way? it would allow the dump chamber to be filled normally and when full the chamber would act normally. While filling the dump chamber, the plate would move back as the chamber fills, as it only exerts enough pressure to keep the gas at 400psi (because it would increase in pressure if it stayed at one point, and this increase in pressure moves it back). the plate would come into play when the marker fires. when firing, the gas would escape, but at a slowly decreasing pressure as you fire, because the gas is exiting and therefore exerting less pressure than before (another weird section of my thinking). the plate would help keep a consistent pressure by moving forward as gas is let out to maintain a consistent 400psi. a spring or magnet would help keep the pressure applied. this would create a consistent pressure throughout the chamber dump stage and use all the gas within the chamber. sorry if this is confusing, i have minor experience in photo edditing or posting pictures (as i know nothing of html) so i'm not entirely sure how to post them or create them within reasonable understandable levels. and again thanks to whoever reads and possibly responds.

[SlartyBartFast]

A moving plate that would decrease the dump chamber size while firing to 'keep' the dump chamber pressure steady, would amount to an on-gun compressor.

Not likely to be possible in any shape or form.

[Rokudon]

lol love going at my posts slarty? lol anyway, its not mainly to maintain the consistent pressure, its more to use up the entire gas supply wihtin the chamber. again, its another idea of mine going into the pistol thingy, so even minor gas efficiency seems good to me. and in case of the plate not moving at a consistent speed at all points, then add a stabilizing rod or two to keep it aligned and from flopping around