Here are a few customized weapons from my current character Lucky, an ork professional bodyguard.
"Mr. Grouchy"
A .605 caseless over under rifle that has been cut down to carbine size. A dark cherry stock with silvered fittings give a frame to two barrels engraved with rose vines that been died red and green.Despite the size of the rifle and bullets, the rifle itself is silent in operation.
PJSS Elephant Rifle w/Smartlink, Skinlink and Concealable Holster
[Electric Firing, Barrel Reduction, Custom Look 2, Silencer]
Conceal Rating: +4 (-7 to hear, -9 with Sub-sonic rounds)
| Damage | AP | Mode | RC | Ammo | Availability |
| 9P | -1 | SS | 1 | 2(b) | 12F |
[<snip>
A concealable holster for a double barreled carbine?

Just how many times did you apply Barrel Reduction?
An elephant gun in such a large caliber probably started out at least 40 inches overall, probably closer to 48 inches. Sure, a custom holster, but concealable? Maybe for a troll and it's on his back not hip/wrist/ankle/waistband.

Then again, my normal SR GM, several of the other players, and myself are all, firearms enthusiasts (ok, fine, we're gun nuts), and we apply what we feel is common sense based on our experiences with real rifles and carbines. (And considering SR's firearms rules, we probably shouldn't.)
Otherwise, a very nice flavorful weapon. Nice to see custom look especially.
Cordially,
Eric