The Lancer Tactical EGLM Grenade launcher combo alows you to use your grenade launcher as a standalone weapon. The launcher itself can be used with most MK16 and MK17 AEGs and can easily be removed or added to the launcher platform. The platform has 4 RIS rails for mounting the launcher and any other accessories needed. Iron sights are included as well as two trigger mechanisms which allow the launcher to be adapted to a MK16 or MK17 rifle. The launcher takes standard 40mm Gas Grenades.