Hey guys yes I have the airsoft version and the paintball version(basically you just swap barrels).The hopup version is not available yet.The brass insert allows you to use regular airsoft mags.If you want the shells to eject you have to use the rap4 mags(30rds).There is no blowback but you can adjust the fps and the rof via allen screws.You can completely submerge it in water and fires fine(great if you really want to pretend to be a navy seal).It can use a small co2 tank that goes in the stock or hook it up to an external tank(hpa or co2).Just a note this thing can shoot really hard(close to 600fps),but you can knock it down to about 350fps.With the paint its surprisingly accurate.With the bbs its ok(not as good as a tuned aeg).If you want to get one(they're not cheap)I would buy the paint version from a canadian dealer(not RAP4 canada they're a ripoff)and then just buy the airsoft kit direct from rap4 in the states.I have ordered different barrels and accessories from them and had zero problems.
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