Designed and first built by George Ealovega the PH-PDW combined a cutting edge technological advance in recoil and rate of fire control with modern composite construction and light weight. The first prototype guns were manufactured by the Rheinlander Instrument Corp for George Ealovega. The original prototype has over 22,000 rounds through it before it was retired for a more advanced model.
The weapon uses a two-stage folding stock allowing for use of body armor or for small stature users. There are two separate mechanical safeties on the weapon. One is a conventional grip safety on the handle and the other is a mechanical toggle lever on the front of the trigger guard. Both have to be disengaged before the weapon can be loaded or fired. The PH uses a hydraulic system similar to a motor vehicle's shock absorber for fire rate control. A link connects the rear of the bolt to the hydraulic unit which completely eliminates the mechanical recoil spring. The hydraulic control unit can be removed and replaced in less than 1 minute if a faster or slower rate of fire is desired. Like most full auto PDW's or submachine guns the PH fires from an open bolt but the unique recoil system allows a very accurate first shot. The weapon claims accuracy of up to 150m A standard Picatinny rail on the top of the receiver allows the mounting of virtually any optics system the user wants.