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XM-8 sniper rifle, probably the only one I'll ever make. You can get an enemy from over 2km away with this sucker, and the force of each shot is very strong. Each shot must be loaded manually, but it's freaking worth it.
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MMGG Type-0 Gauss gun. Fires large-caliber rounds at a slow rate but with horrifying velocity and power due to hyper-magnetic firing system. Yes, there is quite a bit of recoil, but the stock is rather nice, and there's built-in systems that prevent the recoil from being so strong that it can't be handled. You can also attach a bipod if you must, but this isn't a very large gun - it's the size of an SMG.
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RI-HSX lupara. This is a small double-barreled shotgun with a wide, powerful shot. It's not very long-range, but it's ideal for self-defense, and can be easily concealed. Can fire one or both shells at once.
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RSG revolver. It's DIY. Very simple and easy to take care of, and packs one hell of a punch to boot.
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ZH-S8 shotgun. Specially crafted in case of a zombie apocalypse, and made to excel under those conditions. Works fine on human targets, too.
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MD-PC minigun, the giant "F*** you!" to all other man-portable weapons. Is box-fed. The box carries a lot of ammo, but if you have the means you can open the box and hook that sucker up to a belt. The MD-PC (Murderous Desire-Pants Crapper) minigun has 10 rotating barrels. As you might expect, this is freaking heavy, which is why there's an enormous and very extendable bipod (there's a dick joke in there somewhere). The bipod is detachable and can be re-attached anywhere on the bottom of the receiver for optimum performance. When on the bipod, the second handle can act as a sight. If you need a gun to tear the hell out of anything effortlessly (even heavily armored vehicles!), this is the gun for you. This is my favorite out of all my creations next to the Eviscerator.
Oh, and it shoots like this.