Holds up to 50 lbs. of your choice of media - 3.5” of horizontal gun fit adjustment to accommodate most rifles and shotguns - Rack and pinion elevation ram for precise adjustments - Advanced rear recoil absorbing pad protects firearm and shooter - Easy portability when empty - Elastic front retention strap to reduce muzzle jam - The Caldwell HydroSled Shooting Rest is the most advanced recoil reducing shooting on the market. The Hydrosled is designed to protect and grip your firearm with non-marring gun rest components for both front and rear stocks. The HydroSled is capable of accommodating more than just standard hunting rifles but also tactical rifles with the ability to work with most detachable magazines. This shooting rest features fine windage and elevation adjustments allowing you make the perfect shot without difficulty. What makes the HydroSled so unique is the fillable reservoir which reduces recoil and keeps the rest from jumping during sessions at the range. Simply fill the HydroSled reservoir with water dry sand or pebbles and your all set!