MINIATURE M203 GREN LAUNCHER UNDER GREN ATTACHMENT | REQUIRES SMALL INSTALLATION Now fits M16 and AR15 models (ex: AR Coyote & AR USA, M16 Black) You asked, Sarge listened. One of a kind M203 under attachment that fits all GoatGuns AR/M16 models Comes with screw and screw driver. Must remove sling handle and bottom rail guard to fit. 5" in length (12.7cm) 1.5" in height (3.8cm) Comes with 1 dummy gren round which can load & unload Does not fit the short barrel system 100% die cast metal Installation Instructions: When installing - you must remove sling handle on front of barrel. You then need to be forceful when pushing the M203 Gren attachment onto barrel along with when putting railing back onto barrel. Add gren attachment first and then railing after. Please be advised: Not compatible with AR Drum Mag.