The FPS is adjusted by the air rig hooked up to the gun [...]
On an escort gun, it isn't as easy as upping the pressure from your source like it is on a Tanaka converted to External air. Granted you need to operate at a set PSI for the gun to function, and Under this psi, the gun's system will fluster, Including FPS loss. After a certain point you are going to have diminishing returns and say 20-30 PSI over the ideal, you are going to have broken parts and worn internals. Like over boosting a turbo or a heavier grain load on your rifle... All in moderation.
If you look at the design, the function of the air is to FIRST blow the bolt back. As it reaches a certain point, the buffer, the nozzle is moved backwards and whatever residual air is left in the chamber and a lil more is pushed down the nozzle and fires the BB. When this is done, the input air is blocked and the recoil spring takes over a cycles the gun.
Increasing the pressure will put more strain and wear on your receiver and engine block than it will increase the fps. Does it increase? yes. Is it worth it? No.
Unlike traditional GBBR's, which fires First and then Blows the system back, The escort system will notice an increase in perceived recoil before the secondary action of firing hits.
Imagine like on a real rifle, the projectile is fired and THEN a bolt moves, aka a GBBR. On the Escort, Imagine the Projectile is still sitting in the chamber until the bolt moves to the furthest point rearward possible, and then it fires. Backward? Well in the 50ms time in which this takes place, you probably don't notice it at all. But it is what it is.
These engines are designed with balance in mind. screwing with this equation messes with other factors in the function.
Even with an allen wrench, that's just not that hard to carry on the field with you. Does anyone know if any big name Ops have made any official rules about external gas guns like this? I mean, I wouldn't trust just any random person to just pinky-swear not to mess with their air pressure...
Thanks for all the great info!
Most guys run the Palmer's setup and the thumb knob is a life saver on the field and when you are tuning your gun. ( Tuning on the field because depending on your elevation or ambient temp. the expansion properties of the CO2 when you tuned your gun at the shop will differ on the field. Socal heat vs traveling to Cold High Desert for a game)
The John Lu Games are A-OK about External Gas guns and over the pond there games with them, Berget for example. If you have played on the west coast John Lu games, ( Mainly Lion Claws), You'll see a pair of brothers run some pretty wicked setups ( If you were there this year, The Opium Farmers) and many other players with Escort Saw's and etc. All in all, the control group is pretty small. There aren't many cheaters because the systems weren't designed to shoot this hard.
Can they shoot over the limit? Yes. But by simply Over cranking the psi? No, not really.