CRBN FP PWR Individual Insert - .687 BK Knee Pressure controlled poppet engine for

Pressure controlled poppet engine for outstanding performance

Heavily chamfered breech-end opening helps reduce breaks

The i4 is also tested at twice the current impact ASTM standards

Each GRX is packaged with a matching visor

CRBN FP PWR Individual Insert - .687 BK Knee Pressure controlled poppet engine forCRBN FP PWR Insert The FP PWR Insert features a Fluoro Polymer Coated finish for enhanced performance. Process involves multiple cycles of baking and controlled cooling. The application is known as PTFE (Ni PTFE) in which the end result is a hard, scratch resistant surface. This coating provides a slicker surface, resulting in a softer sound signature and smoother bore. The insert is available in the following sizes: . 679, . 681, . 683, . 685, . 687,