mlti meltas and heavy bolters

is there a way to make multimeltas and heav bolters from just using normal meltaguns and bolters if so how would i go about doing that

Meltaguns are probably harder to come by than multimeltas. I would look to trade for them with what you got before I started chopping up meltaguns.

The reason I ask is i can get melta guns easier then multimeltas

How many multi meltas do you need? May be more of a buy/sell/trade thing, but I think I have some.

I need 2 multimeltas and 6 melta guns