ACE Original Skeleton Stock. End cap and butt are machined from solid aluminum billet, oxide blasted and hard anodized. Top bar and center brace are turned from the super strong engineered polymer Delrin. This stock is the strongest and highest quality skeleton stock available. Includes choice of .5" or 1.0" curved, rubber recoil pad. This ACE exclusive is available in three lengths. Includes 1/2" recoil pad.