Nitron XSeries Slide with 5 Bull Barrel – Equipped with ROMEO-X PRO SIG-LOCTM – Fully Enclosed Sealed and Gas-Purged Optic System and Assembled in the USA – Mounts from Underneath the Pistol Slide Utilizing the SIG-LOCTM Mounting System for the Strongest Lockup in the Industry – Side Battery Allows a Low Deck Height and a Standard-Height Iron Sight Co-Witness – Fully Adjustable AX3 Trigger System with Curved Skeletonized Trigger – Custom Hogue G10 Piranha Grips With Alloy Magwell – Nitron Stainless Steel Frame with 1913 Accessory Rail – Improved X-Series Extended Slide Catch – X-RAY 3 Front with Fixed Black Rear Sight – (3) 20rd Steel Magazines with Alloy Basepads – CALIBER 9MM – FRAME MATERIAL STAINLESS STEEL – FRAME FINISH NITRON – SLIDE MATERIAL STAINLESS STEEL – SLIDE FINISH NITRON – MAGAZINE CAPACITY 20 ROUNDS – SIGHTS X-RAY 3 DAY/NIGHT FRONT / FIXED BLACK REAR / ROMEO-X PRO SIG-LOCTM – TRIGGER SINGLE ACTION ONLY AX3 SYSTEM / CURVED SKELETONIZED TRIGGER – OVERALL LENGTH 8.6 in – OVERALL HEIGHT 6.8 in – OVERALL WIDTH 1.7 in – BARREL LENGTH 5 in – SIGHT RADIUS 6.3 in – WEIGHT W/MAGAZINE 48 oz