I've PMed Demian to ask him if he was interested to make this weapon, and here's what he said:
«I tried doing it but it didn't really work with a blockhead. The scope is too far back. I could make it fit a blockhead better but it would look quite a bit different from the original accessory.»
Afterwards, I resent him a message saying it wouldn't worry too much if it doesn't look exactly like the accessory, as long as it's chargeable (because sincerely, we do need a GOOD chargeable weapon for Blockland), but I didn't had any answer yet.