|
Applies to all platforms.
The shorter the barrel, the lower the gas volume needs to be, the higher the gas pressure needs to be.
GBBR's and P*s start with high pressure anyway, so using longer barrels is inefficient.
GBBRs are just less adjustable since you need to adjust the poppet valve to adjust gas volume. For example; those fools running 14" barrels in their vectors aren't actually shooting much harder than I am with the stock 5" barrel using .30s. They get higher fps on .20s, but joule creep in reverse like crazy, because the gas volume per shot is tuned to a 5" barrel.
In an AEG, the smaller the cylinder volume, the faster the piston hits that compression zone, the higher your initial air pressure will be.
Neat funfact: If your P* is tuned to be air efficient (you're not joule creeping very much switching between .20s and .30s), then the pressure dynamics inside your barrel are almost identical to that of an AEG.
|