Leon explains using Green Gas on plastic airsoft gas guns if they will be prone to cracking or not... "This video explains the different gasses for polymer slide airsoft guns. Your slide may be prone to cracking using green gas or anything more powerful, you should use weaker gasses however using green gas will not break your airsoft gun unless you use green gas regularly.

One of the gas blowback pistols you might want to have as part of your collection is the Western Arms M92FS Leon GBB. This comes with a compensator and a silencer making it a good hitman's weapon. With the Magna Blowback it will produce a hard kick. It's hard to find it with airsoft retailers with the exception of Japanese airsoft retailers.

Mach Sakai gives it a full review with the video version you can watch below (in Japanese):

Looking for another source of the Biohazard Sentinel 9 Leon Model which is a limited edition release from Tokyo Marui? If you're looking at the RedWolf Airsoft, you're lucky to select them too as they have it in stock and just find US$275.00 to make it yours... "Feel like taking out a few zombies with a head shot?

Now in stock at eHobby Asia is the Limited Edition Tokyo Marui Biohazard Sentinel Nine Leon Model  which they are selling for US$270.00... "P226 Model from the popular video game - BIOHAZARD (Resident Evil). The P226 Gas Blow Back Model is target for fans & collectors because of its high detail in replicating the Real gun from the video game.