Is that possible without destroying the stock block?You'd have to grind a groove about 2mm deep ,4-5mm wide ,and about 12mm long on the bottom of the block so you don't have to cut the nub off the rear of the ump lower that holds the ump buffer and backplate on.
AFAIK, there are 2 modifications to the UMP lower to mate to the stock block B: the chamfered cuts on the lower and the removal of the nub.Sure sixy. I'm just trying to think of a way to use the stock block temporarily without having to mod the lower. Not sure why HDPS didn't make them that way anyway.
It would still work fine without the little bump. It only holds the rear block from sliding off when the lower is removed. None of the changes needed to use a stock block would make the lower unuseable for a grafted type conversion.Is that possible without destroying the stock block?
I really do appreciate all that joe. Can't wait to get her in. I'll text you the tracking number tomorrow. Probably be around lunch time.I've already trimmed the nub and rounded the corners for you. The nub merely holds the rear buffer on while the lower is out of the gun. It is a non-functional feature.
With the stock-block, you do not use the disassembly safety but I will include it in a baggie so if you ever get the fuse conversion, you can install it into the lower. It is a non-functional part other that prevents you from accidentally dropping down the lower with the bolt back causing the recoil rod to shoot out the back of the gun or into the stock cavity. HK really thought of everything.
I went ahead and began to remark the selectors. I know it wasn't part of the original deal, but I really want your conversion project to be as clean and as easy as possible.
Because HK doesn't care to convert a USC to a UMP. Thats why they make the UMP.Does anybody know why stock blocks are made by hdps insted of hk?