The ACE is powered by Retay's Straight Line Inertial Transfer System(TM), the patented Inertia Plus Bolt Rollover Torsion Spring Action(TM), and the Dead Straight Deep-Bore Drilled Barrel(TM) for maximum performance. It offers on target, no float aiming and Retay's Out of the Box Optimization Factory-Lengthened Forcing Cone(TM).All Retay models include recoil pads for added comfort, and the new ACE leads the way with our most advanced solution yet: the AIRY Pad - a next-generation recoil pad that reduces felt recoil by up to 30%, delivering a smoother, more controlled shooting experience in the field or at the range.