First off, when using ammunition to craft one type, the ammo stays the same after a successful roll. Leaving absolutely no need to ever buy more ingredients than the main one. Which is hard to explain to people IC as well. "I need twenty of this item, here's twenty magazines." "Uhh, I only needed one."
The molotov cocktails when being crafted have a fairly high chance of yielding two from one bottle, which doesn't make sense in itself. And also require very specific and expensive types of bottles while the other types are fairly cheap, leaving this one fairly underused when otherwise it'd be a more preferable item as far as homemade crafted bombs go.
When making ALL these, the gas level in whatever receptacle you're using never lowers. You just crafted ten ethicol bombs, how do you still not need gas?! Which segways into my next point. The timebombs also have a chance to yield two, but from the main item that is used.. That's also not logical. Albeit, any second bomb crafted will have a lesser quality.
As for non-craftable items, I propose providing a piece of equipment that can make these craftable by players with said equipment. This will also lead to more uses with the munitions skill as well, meaning you can use the same equipment to craft ammunition! This will bridge the gap between war lords, fixers, solos, and bomb techs in a nice way in my opinion because currently the explosives skill is rather niche and I'm absolutely in love with it and would also like to see more homemade bombs!