Death Star Cannon 75246 | Star Wars™ | Buy online at the Official LEGO® Shop US
LEGO MOC Compact Cannon with wheels by Xigphir | Rebrickable - Build with LEGO
Lego Dark “Pearl” Gray Shooting Cannon W/ Red Base & Gray Wheels | eBay
Amazon.com: LEGO Hidden Side El Fuego's Stunt Cannon 2020 Polybag (30464) : Toys & Games
LEGO Pirate Red Cannon Lot - Red Shooting Cannons (for minifigs) | Walmart Canada
LEGO Cannon with Reddish Brown Base | Brick Owl - LEGO Marketplace
I made a lego hand cannon when i was bored(you can reload like most of handcannons in destiny(if you want too see write in comment) and it shoots but not very well) :
Compact cannons, based on stud shooters so you can fire. : r/lego