Command & Conquer: Red Alert 3/Leech Beam Effects

Hammer Tank
Two cannons firing at the same speed, causing nearly the same damage which adds a respectable amount of firepower to the already powerful tank.

Sickle
Lethal combination with a powerful anti-infantry turret that can really pack some heavy damage on infantry. The range is on par with the cannon so it will always assist in killing anything you're deciding to shoot.

V4 Rocket
This equips your Hammer Tank with a devastating V4 Rocket inflicting enormous damage on pretty much everything. The downside is that neither can be used together. The V4's minimum range conflicts with the cannon's range and a Hammer Tank with this setup is prone to bugging out and reversing from an enemy when you want to just shoot it.

Dreadnought
It's exactly the same as the V4.

Bullfrog
Upon leeching a Bullfrog, your Hammer gains a respectable anti-air device. This is on par with a normal Bullfrog but has the strength of a Hammer Tank. The deceptive nature of an AA turret it can pose a deadly thread to air units.

Apocalypse Tank
Should you be graced with the sheer luck and ability of stealing an Apocalypse cannon you'll find that your somewhat meager Hammer has now become a weapon of devastation and danger. Combined with your own basic canon is a dual firing heavy cannon, which grants the ability to take on several times its own weight and survive.

Mirage Tank
This is one lethal tank, gaining all the strengths of the Allied Mirage Tank. This Hammer becomes a force to be reckoned with since the spectrum fires at a steady rate and offers the same scatter damage. With the cannon for support, it makes short work of generally anything. There is however a small range issue with this; the cannon range is a fraction longer than spectrum range, thus if you initiate a battle, the spectrum won't trigger until you move slightly forward.

Guardian Tank
The Guardian Cannon fires at a lower rate than the Hammer Cannon beside it, but offers a greater damage output.

IFV
After leeching the life out of an IFV, your Hammer Tank will gain a rocket firing attachment that is anti-air only.

Hydrofoil
The anti-air on this unit is absolutely devastating. The damage output is strong enough that it could even equal the strength of an Apollo. This is one extremely good anti-air attachment.

Riptide ACV
This gun turret, though very similar to the Hammer Tank & Sickle combination does appear to do slightly less damage, however still useful against infantry.

Aircraft Carrier
Should you manage to somehow leech yourself an Aircraft Carrier, your Hammer Tank now comes equipped with this nifty little scout drone. If you target a location, the little drone buzzes towards its prey but then proceeds to fly past it and back to its little dancing area. It does however increase line of sight slightly.

Assault Destroyer
Should you somehow manage to fight through the enormous health of an Assault Destroyer, your Hammer now comes equipped with this very powerful cannon that makes your main cannon nothing more than support. It's heavy damage, but has a slow rate of fire.

Athena Cannon
It comes out generally whenever you are in range to use. Even though it doesn't collaborate with the main cannon's range, it doesn't bug out quite as often as the others. It is a very nice attachment that does significant damage to anything standing still.