RE: P.S.E. NV system
They are a joint venture between Sims Labratories and PSE. They are like the Limb Savers on steroids. They mount under your limb bolts so they don't come off like the limb saves and they do a better job of reducing recoil. They will fit on any bow that accepts they regular limb bolts and beveled washer. I have bought the NV's for every bow that I own and they reallywork well. Of course, the higher poundage bows shooting lightweight arrows will see more of a difference than the bows shooting 50 lbs and a 500 gr. arrow. You will not regret spending the money for them. They will make your bow slightly heavier but it is not bad. It doesn't take long to get used to them.