The image above is a 10 pound Parrot Gun, which is made of Iron. Another common piece used by the 43rd, it shot a 10 lb projectile (hence the name). Named for the gun's inventor, Robert Parker Parrot, the cannon has a 3" bore and is accurate up to 1850 yards making it one of the more powerful cannons being able to shoot hundreds of yards farther than most of its counterparts. Being rifled also made it much more accurate.
The weapon above is a Pattern 1861 Enfield Musketoon. A shortened variant of the famous british 1853 Enfield, it was a popular weapon among artillerymen in Europe being its effectiveness at close range. It's a muzzleloading weapon that shoots a .577 round using a percussion cap for the action. England exported large quatities of goods to both belligerents so this weapon would have been common among both Confederate and Union artillerymen.
Modeled off of the ancient Galdius (a common sword from ancient Rome), the artillery sword was and important weapon of last resort for any artileryman. Since an artillery battery moves slow due to its immense amount of equipment, artillery positions are extremely vulnerable to being over run by calvary or infantry and need quick to use weapons in case of such perilous situations. Artillery swords are short, measuring at the most 30 inches, and are very light making them easy to wield. This weapon in many cases would be an artileryman's life saver in the event of being outflanked and overrun by the enemy.