The Gundo Holsters OWB2F has the adaptability of the original OWB2, being compatible with Safariland, G-Code, Blackhawk and Blade-Tech platforms.   This listing includes the selected attachment.  Additionally the OWB2F will accommodate optics, suppressor sights, threaded barrels and compensators. It's full length open muzzle design will allow it to fit multiple models and barrels lengths for each make*.  Adjustable retention via 3 retention screws. 

*Sig P320/M17 9mm/.40 will fit P320 Compact, Carry, Full size, X5 and M17 in 9mm or .40 cal.