[Glyph]

Yeah, you can either use the unambiguous quote from the rules to disallow it completely, or use Ryo's suggestions to make it a difficult, but barely possible, thing to do.  The only thing I would add is that I would nix any barrel mods like heavy barrel or gas-vent, for a minigun-type weapon with rotating barrels.

[DoubleTap]

all great ideas thank you.  I after showing him how much it would cost to mod the thing into something troll potable, not counting how much it would cost just to gett the work done, he settled for a Vindicator mini gun, with a Ammo pack.

[DoubleTap]

also, he said he wanted  a troll portable version of the M252 bushmaster.

[CanRay]

also, he said he wanted  a troll portable version of the M252 bushmaster.

Buh?   

[nakano]

Honestly, I would let the player have his toy, and live with the consequences.  It would either become a once in a long while piece of firepower, or end up causing the character so much trouble it would not be worth carrying, leading back to the first result.

If you have warned him about what a drekstorm it will cause with authorities you have done your part.  If he doesn't listen, he has had fair warning.

[Mason]

2. Not easily concealable, even on a troll, hehe.

Just stick it in his pants and go to an elf stripper bar. He's just happy. Optionally, if he is Bubba the Love Troll, you don't need the strippers.

[Zilfer]

My Friend is playing a nine foot tall troll.... tell him he can't hide a panther.

"I just got big bones"

[JustADude]

also, he said he wanted  a troll portable version of the M252 bushmaster.

The 81mm mortar launcher, or the 25mm auto-cannon, which is actually the "M242"?

The former is quite possible; they've got a shoulder-fired mortar (the Esprit MPML-3) in WAR! on p155.

The second would basically just be an Assault Cannon with (given the rate of fire on those things) a Semi-Auto mod.