Many who love the PSE TAC series crossbow but was concerning about the fontal area being too heavy. Firenock just finish the upgrade to the upgrade kit we offers. We have updated the PSE Tac kit from last year kit by adding the limb pocket pivot hollow titanium female screw, which eliminate 2 of the ¼"-20 button head screw. We also added the scope rail screws and the water level hold screw to make it a 21 screw set upgrade. For those who prefer even a little lighter and higher performance, the hollow limb bolts upgrade is an option you can add to your kit for another $20.00.