Indra Stem to catch better

++Updated the Fbutt to have a sloped edge at the top (Where the plunger first contact when pulling back). This lowers chances of the plunger being stopped by the fbutt

Can use this version of the stem for the Indra if you are experiencing catch issues. The stem is made slightly thicker at the back to allow a larger area for the sear to hold onto. The fbutt and plunger were modified with a slgihtly larger hole to fit the stem through.

(Note, the stem was tested but the fbutt and plunger were untested. Do feedback if any issue)