AFTERBURNER + RAMJET together reduce recoil up to 44% when using 115g ammunition. At only .47 long, the AFTERBURNER offers unprecedented performance in a micro compensator and is more effective than the majority of full-size compensators on the market. The INTRA-LOK mounting system uses the taper lock principle: a tapered locking pin interfaces with an angled V-groove on the underside of the barrel. This perfectly times the compensator as it locks down onto the V-shaped profile on the muzzle end of the barrel. Angled front faces on the Afterburner aid in holstering. The Radian RAMJET is a match-grade pistol barrel that delivers an accurate and reliable weapon system. The fluted barrel features a gas sealing chamber as well as a loaded chamber indicator. Installed onto a G19, the AFTERBURNER + RAMJET combo increases the overall length of the slide to a G17 allowing compatibility with all G17 holsters. This combination kit is for GLOCK19 GEN4 versions. The AFTERBURNER Compensator and RAMJET Barrel is legal for sale in all 50 States.*