New to the XMACRO family, the XMACRO TACOPS RX continues the theme of "more" with 4 21rd steel magazines included, an all-new enhanced slide catch lever, Threaded Barrel, Sig Loc Romeo-X and a metal flared detachable magwell to make the most of those extra magazines.P365-XMACRO TACOPS Features:a Macro-Compact Grip Module Featuring Standard 1913 Raila Sig Loc Rome-X Red Dota (4) 21rd Steel Magazines with High Visibility Followersa Extended Slide Catch Lever for faster manipulationa Flared Detachable Magwell for improved reloadsa Interchangeable Small, Medium, and Large Backstrap Includeda 4" Threaded Barrela XRAY3 Day/Night Sights