It does have a foregrip, and it's got one siderail on the right sight only:
I'll be adding one to the left side myself. The grip does fold in a way that lines up with the foregrip, but that does make sense as otherwise it'd kind of be awkward to hold if folded.
I'll also be putting rail covers on the top as HUNK doesn't have a tactical rail on the top of his gun, and hiding them is probably safer than trying to file them off.
Originally Posted by W4RH0US3
When I get my MP9 should I paint it gun metal? or Black is fine?
That's up to you, really. The gun will look just fine with the costume in black, but technically in RE4 the gun was textured with a dark gunmetal. You can accomplish this by painting it gunmetal and then weathering it with some black shoe polish or even black paint used carefully.
Vernedead has a point about airsofting with it. You'd probably get chuckled at by fellow airsofters, at least until you explained to them that it's a replica from a game. At which point they'll either think it's cool, or they'll chuckle more. Keep in mind these are the same people who slap 8 magazines together on a G36 and call it a SAW, or play as a sniper because they want to get lots of kills. Airsofters can be a silly lot. If you don't care what they say, go for it.
But honestly, the gun looks good in black or in gunmetal. It just depends on what you want to do.