I use the big green coleman propane cans. As far as I know the gas isn't cut with anything else so just pure propane. Quite big and last for a good while before they run out. They generally go for £20 each.
I've had a Madbull adapter for years and never had any problems with it. The last 2...
For sale one Vipertech XM177E2 with mags and spare bits.
Bought second hand from the first owner that bought it new 2021, presumably one of the last to have gotten surface anodizing as they stopped doing it later that year due to the cost and delays. I have got it fully bedded in, been used...