The Radian AFTERBURNER + RAMJET combo provide unprecedented recoil reduction and match grade accuracy in a concealed carry package. The threadless barrel design allows for effortless install/removal for cleaning while LEGAL FOR SALE IN ALL 50 STATES*. The AFTERBURNER compensator is machined from hardened 17- 4 SS and the RAMJET barrel from hardened 416R SS; both are enhanced with a DLC (Diamond-Like Carbon) coating. This combination achieves low friction high hardness and high corrosion resistance making overall durability and erosion from muzzle blast a non-issue.The INTRA-LOK mounting system uses the taper lock principle; a tapered locking screw interfaces with an angled V-groove on the underside of the barrel. This perfectly times the compensator as it locks down onto the upper barrel profile on the muzzle end of the barrel.INTRA-LOK allows the user to simply slide the compensator over the barrel insert and tighten the locking screw making for a simple and repeatable installation process. This system allows the user to easily remove the barrel from the slide for cleaning.Installed onto a Glock G19 the AFTERBURNER + RAMJET combo increases the overall length of the slide to a G17 allowing compatibility with all G17 holsters. Angled front faces on the AFTERBURNER aid in holstering.This combination kit is for: GLOCK19 GEN4 (or compatible)