[1] Much polymer is used in the firearm to save on weight and cost, with a steel slide and barrel and aluminum internal grip frame.

[6] Since its initial market introduction, the PMR-30 has undergone several improvements due to problems with the early available design.

The twist rate on the barrel rifling was increased to 1:11 to better stabilize bullets and reduce key-holing.

Kel-Tec also offers an extended 5" threaded barrel for the PMR-30 with an aluminum flash-hider to reduce the high amount of muzzle flash produced by escaping gases.

[9] In gun tests the KelTec PMR30 .22 WMR pistol gave an average velocity of 1,351 feet per second (412 m/s) from its 4.3 inch barrel.