Madbull XG02 Airsoft Propane Adapter with Silicone Oil Port

"I have no complaints about this. I've always loved madbull and this is my favorite propane adapter out there. Use silicon grease distributor and close it tightly before use but otherwise it's a fantastic adapter.

"Works great after a little fiddling. I just have 3 things to note:

-The spring feels extremely stiff initially, but it will loosen over time
-The stock flat o ring that seals the tip against the silver outer casing is HORRIBLE. It leaks after about 3 fills. Do yourself a favor and replace that with a conventional o ring.
-This is a minor gripe but the hole in the tip is too narrow for most fill valves, so it just sits on the tip rather than fully covering it. This results in no contact with the fill valve o ring, and leaks some gas on valves that aren't brass. This can be fixed quite easily with some B7000 glue and another very small conventional o ring.

It is makeshift? Definitely. But it now works flawlessly so I don't care.

"Pros
saves money
seems well built
looks great

Con
only refills one magazine before needing removed and attached again. (nothing comes out)

"I bought this for my king arms gbb m4. It works very well for my Marui 1911, but the valve on the m4 gbb magazine is slightly larger, so the Madbull adapter does not seat properly around the fill valve and sprays propane everywhere. I thought it was o-ring problems so i bought replacements and have gone through nearly all of them before realizing this nozzle does not fit properly.

"Just awful. Bought it to use with my WE 416 and KWA USP and it's just crap. Would leak out of the sides and would completely freeze over. Buy a plastic propane adapter like the Airsoft Innovations one, much better.

Pros:
Looks cool.
Madbull (which is usually a good company)

Cons:
Does not work as should.
Freezes the O-ring and itself.
Does not fill mag.