SPAS-12 Upgrades
 

I have a Tokyo Marui Spas 12 and am wondering about upgrades for it. I have heard that it is possible to put AEG springs into it and I would like to confirm this "rumor" before i break the gun by putting too tense a spring inside. I also have FA-MAS SV that I use as my primary gun. I have heard that it is not possible to upgrade the FA-MAS because you can't upgrade the mechbox to handle the strain of other preformance parts. Is this true or not? Any hep/advice is much appreciated.

There are upgrades for the Marui shotguns, but personally I am not interested in them at all. That gun works so well as it is, there's no need to upgrade.

There is no reason not to upgrade a FAMAS within reason, but it is one of the first guns made by Marui. Read the pinned subjects in this part of the forum; they cover the basics for any AEG. The rest is up to you.

TM shotties have very limited upgradeability. Go to WGC or redowld and type in "spas 12" or "super 90" and you'll find upgrade springs, nozzles, and inner barrels, but that's about it.