The Shadow Systems XR920 Combat Optic Cut Semi-Auto Pistol is fully-customized handgun from the factory that fits in GLOCK 19 holsters. The XR920 is sized like the GLOCK 45 with its full-size frame and compact slide. The frame on the XR920 features new modifications from the MR918 that make it an incredible platform. The beavertail has been extended. You get deep cut thumb slats for a more aggressive texture. The trigger guard fits holsters better with its redesign. The slide stop curtain block is larger, making it more difficult to accidentally press the slide release upwards, locking the slide prematurely. The slide features a thinner profile. The corners of the new Shadow Systems slide are beveled and angled forward in the rear for more comfortable carry. The beveled cuts on the front aid in reholstering. The new Shadow Systems optic cut includes a relocated extractor depressor plunger assembly, allowing longer screws and creates a greatly enhanced hold on the optic. This Shadow Systems firearm is fitted with a match-grade, fluted, TiCN finished barrel. If you're looking for a heavily-modded carry pistol that's built by one company for extreme reliability, Shadow Systems makes an excellent pick for you by removing tolerance-stacking issues of custom-built guns. Full-size, 17-style grip length Compact, 19-style slide length Larger beavertail More aggressive thumb slats Enhanced slide stop curtain block Beveled and angled corners Oversized, bolt-on magwell funnel Thinner slide profile Combat optic cut features extended screw depth for a stronger hold Optic cut plate cover included Fluted, match-grade barrel Relocated extractor depressor plunger assembly Redesigned trigger guard fits GLOCK 19 compatible holsters