Strike Industries' G4 SlideComp is the industry's first slide mounted compensator for Glock Gen4 pistols. It requires no permanent modification to the host platform, and eliminates the need for a threaded barrel. The profile of the compensator aligns with the slide, while the internal geometry and ports work to reduce muzzle rise and perceived recoil. The compensator can also be used to push-rack the slide against hard surfaces, to clear malfunctions or lock the slide back for a reload. It is not compatible with Gen 1-3 Glocks. The recoil spring assembly supplied is compatible with full size models. This model is compatible with Glock 19/23/32 Gen4 models and has a black finish. It requires a Gen 3 compact spring for optimal functionality.