Well. I bought a KWA M9 PTP and got this. I was overall happy with it... that is until I used it.
It will keep spraying out propane when you take it out of your mag, just like the other reviewers said. I figured it would stop doing it after the first 5-10 mags but as of now the problem persists. It's very annoying, makes me nervous, wastes propane, and makes everything around me including me smell bad when it happens. I'm giving this a 3 star only because the construction of this adapter is very nice. If this problem stops I will rethink my rating, but as of now I can't really recommend this product.
Pretty good price
Only works on Coleman (I don't care though honestly.)
SPRAYS FREAKING GAS EVERYWHERE WHEN YOU REMOVE IT FROM THE MAG!!! This is the only major problem I have found with this adapter and even after 10 or so mag fills it hasn't stopped. Take this review into consideration before you purchase this.
Rating: [3 of 5 Stars!]