My problem with the Rain Forest is that the description is for a Carbine, and the stats aren't. Carbines have short barrels, so the accuracy shouldn't be as high as it is, nor should it have the same range as standard assault rifles. It still uses Assault Rifle ammo, but with a little less power (shorter barrel again), so the damage shouldn't be as high, and the AP shouldn't be higher than any Assault Rifle either.
The best stats that Assault Rifles have in Core is Acc 6, Dam 11p, AP -2... this Carbine should be weaker than those, not better than all of them. This is almost on par with the Krime Cannon at 16p and -6 AP.
if I use this weapon, I might just reclassify it as a mini Assault Cannon, drop the Accuracy down to 3 for the short barrel, and double the cost maybe.