You may be able to do something similar to the Trracer/Maverick design. There is a spring in the bottom held in place by the frame to help with double feeds. A Tippmann style detent may be possible too and that would require minimal work to install, just a small slot in the right place as long as its not in the way of the trigger/sear.
I just got a pile of Palmer detents, I will look at my friends Hammer tomorrow and see if it can be done, you may need to drill the hole at the top of the body instead of the side. Another option is a Spyder style detent, a small hole drilled right into the breech area that is wider below should work too.
Everyone says "Well maybe i'll make a difference",
Thinking they've got plenty of time
But you're squeezed a little tighter everyday
Finished before you can commit a crime
Last edited by DarkNinja; 06-25-2012 at 04:03 AM.