Glock 19 fans can now experience the power of the flamethrowing 22TCMR cartridge by simply swapping out the barrel spring and guide rod with the 22TCM9R conversion kit. Revel in the penetrating power of 2000 fps while enjoying the easily-managed light recoil famous in the 22TCM design. - Caliber Supported: 22TCM9R - Barrel length: 4 in. - Weight Empty: 138 grains - Finish: Parkerized - Rifling Twist: Right hand 1 turn in 16 - Number of Grooves: 6