|Green anodized aluminum threaded feedneck fits the Empire Invert Mini, Smart Parts Ion and Impulse Guns. Attach the included adapter ring and it fits all Spyder models with tabs/wings including the EM1, Fenix, Flash, Imagine, Raven Nexion, Primal, Rodeo, TL, older Xtra, 07 Pilot and newer Sonix. Will hold the heaviest electronic loader. Standard press fit neck design. 2.25 inch tall. Will fit all other compatible markers.