If compact is key then I would go with a Strive standard. The JM20 is also good. The JM20 is possibly more solid with better heatsinking but the Strive is smaller, lighter, and has better UI (imo). I have some old DQG’s that I might do something with one day but as mentioned the switch could be better. Are you after a flooder and something with just a little throw?
I just finished designing out a 26650 that is a triple…with Carclo optic and an AR protective lens. It can be a single just as easy if wanted. It looks like this one will come out just under 5.25”. In the assembly drawing, it is measuring 5.024”. I’ll post some images when these come off the machine. TL
I have two of these BTU PK26 in both tints, cool white and neutral white. They are awesome little lights and shipped form Salt Lake City, Utah. Very reputable seller. Price is great at $56 and very prompt shipping. The light output may even be a little underrated at 2000 lumens. These little bad boys get hot though. If you leave it on turbo until the 120 second step-down it’s pretty warm (will not burn you but you will definitely know it was pushing amps).
This is my favorite small 26650 light ever tested.