Why propane? Its cheaper. For those who run lots of gas guns and/or GBBR’s, its just easier and cheaper to have a larger tank of the same pressure gas that costs less. Yeah, I have to add silicone oil on a regular basis or else I dry out my seals and end up with leaks and/or anemic GBB performance. Yeah, I have to open up my gun and do regular maintenance on the rubber seals. Yeah, propane smells terrible. Its all about finding that balance that works for you.
In my opinion, the best propane adapter currently available on the market and my personal choice is the Airsoft Innovations Propane Adapter V5 (picture used without permissions from Airsoft-Innovations.com). These are produced by a Canadian company, and the current generation of AI Propane Adapters are built from plastic. Plastic means that this design won’t wear out your soft brass fill valves, as I’ve seen the Madbull metal ones do to WE and KJW mag countless times. The AI Propane Adapter is actually sold as a kit that includes a duster adapter (for duster gas cans that have lower pressure gas inside or replacement nozzle tip) and a bottle of silicone oil that I find lasts part or most of the AI adapter’s lifetime.
I do own a few of the Airsoft Innovations Propane Adapter Kits, and I have owned/used the previous versions.
Now, the major problem comes in when you have mags with tall base plates. Charging these magazines require a longer nozzle tip in order to actually reach and function with your magazine’s fill valve. AI’s included “duster adapter” sort of fixes this, though it does add a significant amount of length to a nozzle tip that is already made from plastic that is soft and flexible. These nozzles do break eventually, and having that extra length on the AI adapter makes me paranoid about breakages even more.
But what would happen if someone were to release a propane adapter that actually is designed with a longer nozzle tip to reach those deeply-inset fill valves? Yeah… this is the biggest selling point of the new kid on the block, the Tactical Crusader Propane Adapter. Pretty exciting if you need a longer nozzle tip.
The above YouTube video is NOT mine. Its from a retail store in the USA called 321Airsoft – I’ve recently stumbled upon their game play video footage with a number of Polarstar-equipped guns. I’m impressed with how those P* guns seem to be working thus far. Anyway, that’s besides the point. Cool YouTube channel that doesn’t try to sell you something in every video, produced by/for an actual retail store – you don’t see a lot of those. I like that.
I don’t own a Tactical Crusader Propane Adapter.
Note that I still don’t like metal propane adaptors as it will eventually wear out your brass fill valves – I have more than enough WE magazines with shit-metal fill valves, I need to take care of those as best I can. One solution to this that requires more money invested into your already expensive GBB would be the Madbull steel “grenade” fill valves – these fit and function just fine in most WE and KJW mags as upgrade/replacement parts.
P.S. I don’t actually require a longer propane adapter tip myself. Its not something necessary for any of the magazines I currently own. I personally prefer to wear out my AI plastic propane adapters instead of my fill valves.
P.P.S. I usually don’t follow the AI recommendation on this to prevent injecting too much oil into my GBB’s hop up rubber, rather I just lube my piston head o-ring/seal, and mag o-rings and seals on a regular basis.