The M9 PTP was developed exclusively as a durable professional training weapon. What sets the M9 PTP apart from the competition is the new KWA internal gas delivery system. Almost every part of the gas system has been overhauled and re-engineered to increase efficiency and reliability. The heart of the new system is a new advance lightweight gas piston that increases the weapon cycle rate which provides for a faster and more realistic blow back action.
The new M9 PTP uses a new outer barrel design with integrated feed ramp and locking block for positive feeding and reduced lockup time. The frame and slide of the M9 PTP is constructed from high quality alloy steel and is made to a 1:1 ratio of the real firearm it replicates. Weights are strategically distributed during production process to closely match the weight and balance of a real firearm. Functional features such as the slide catch and hammer decock safety are faithfully replicated and adds to the realism. Beveled magazine well aids in quick and accurate reload. Even the M9 PTP magazine has been completely redesigned to compliment the new gas system. Instead of metal stamping, the new magazine is milled from a solid piece of steel bar stock. New O-ring designed needle valve prevents excessive gas from escaping during gas fill ups. 360 FPS.
I own one of these as well and they are by far better than any stock GBB made today. As far as I know they were initially made for Police & Military training. The only down side is that the magazines are more expensive than regular GBB Magazines.