When I initially recieved my SPAS-12 I noticed the foregrip was a tad loose but I didn't think much of it. I had a BB drop into the foregrip a little while ago and took apart the fore grip to get it out. When removing part S-9 (its sort of a cover, under the fore grip) from the gun, I noticed that one screw was missing inside the cover, and another screw was too long to secure the fore grip to the gun. I have no idea how this could possibly have happened since I got the gun new nor do I have any idea if this is a common problem/mistake.
The screw heads were about 5mm in diameter and + shaped. I'm not sure what kind of screws are supposed to be in there, but I'll look into it.
Anyways if your SPAS-12 has a wobbly fore grip check it out.
Here's a link to the gun's manual for reference:
http://tech.airsoftcanada.com/TM/TM%...S12/SPAS_1.jpg