The Mossberg 500 FLEX is a modular system of shotguns based on the legendary model 500 with the LTS (Tool-Less Locking System). This system consists of three convenient connecting technologies, that come together to bring another level of flexibility to your hunting and sport shooting endeavors. One locking pen is for the stock, one for the forend and one for the recoil pad. Blued/Black Oal 31" Type Pump Grips 5.75 lbs Action pump Safety Ambidextrous Top Tang Series FLEX Tactical Sights White Dot Front Weight 5.75 lbs Caliber 18.50" Capacity 5+1 Stock Type Stand-Off Breacher Stock Finish Black Weight Range 5 lbs to 5.99 lbs Barrel Length 18.50" Stock Material Synthetic Barrel Length Range 18" to 18.99"