Yes, it's a piece of crap, it can do some major damage to things implying you manage to hit it.

This is my recreation of the British-Made WW2 SPG, 40RBL78 MA Field Gun, Long story short, the British engineers really wanted to make tanks out of vehicles that were already being produced and/or that were already produced in mass as it was. So they decided to take crappy "Ruston-Bucyrus built  Crane" and did some modifications to it and added a 4.5inch Gun to it, with their fingers crossed that they'd poop out something of decent usefulness.               

Necessities (Possibly maybe, not certain will be marked with *):

• ACF
• SProps
• Wiremod
• TF2
• CS-Source*
• HL2-Source*
• HL2 Episode1-Source*
• HL2 Episode2-Source*

Controls:

• WASD - Forward, Left, Backward, Right (this should be a go figure)
• Shift - Brakes (the top speed is like 10km/h or something, letting go of WASD will probably instantly stop you anyway)
• Alt - Engine Ignition Toggle (kinda important if you want the thing to move)
• Space - Horn (literally useless, spam it next to someone and annoy them or something, idgaf)
• R - I don't think does anything
• F - I don't think does anything
• 1 and 2 (Above QWERTY) - Selects Ammo, you have APHE and HE, go blow things up, high blast
• Mouse 1 - Fire the Gun
• Mouse 2 - Unlock/Lock the turret
• E - Allows you to get the hell out and run before the thing goes off like a nuclear bomb

That should be everything, just an FYI, it's paper, it's slow, and has a crapload of recoil, it's not meant to brawl with people, use it wisely or don't, i don't care to be honest.