As long as you have that weird curved grip, it's going to fit weirdly in the blockhead's hands. I mean it IS the whole flintlock pistol look, but maybe you could do something like make two models, one with the model how it is (scaled properly though) for the item model and then another with a cut into it like the default Blockland horse, so when the player holds it, it doesn't go through the player's hand.
