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.Specifications and Features: 44% recoil reduction in combination (115g ammunition) AFTERBURNER: Hardened 17-4 stainless steel RAMJET: Hardened 416R stainless steel Taper-lock screw interface: No Loctite, shims, or setscrews needed Angled front faces aid in holstering Match grade cut rifled barrel Fluted barrel Gas sealing chamber No threads, legal for sale in all 50 states Makes length of G19 into G17 length, fitting all G17 holsters For Gen 5 Glock 19