This is my first upload in a while, so I hope you all enjoy these parts. I just built a new PC, and I've got to migrate my stuff over from my laptop. The cannons are a mix of real cannons I've tried to replicate accurately and fictional cannons inspired by real cannons that did exist.

If you look from left to right in the picture, the cannons are...
1. 20mm Rheinmetall-Oerlikon Autocannon
2. 25mm M242 Bushmaster Chaingun
4. 30mm Mk44 Bushmaster II Chaingun
4. 35mm Bushmaster III Autocannon
5. 40mm Bofors L/70 Autocannon
6. 57mm Rheinmetall-Bofors Autocannon
7. 75mm Ares XM274 Cannon
8. Modernized 8.8cm/88mm Cannon
9. 90mm Cockerill Low-Pressure Cannon
10. 90mm T54-M4 Cannon: A fake 90mm cannon based on the one mounted on the T26E4 'Super Pershing' with simulated APFSDS ammunition
11. 105mm M68A1E4 L/60 Cannon
12. 120mm Rheinmetall L/60 Cannon: Inspired by the L/55 cannon of the current Leopard MBTs just with improved shells and velocities with the extra length
13. 140mm XM-219 ATACS L/60 cannon: Sorta based on the real experiments done mounting 140mm cannons to both the M1 Abrams 'Thumper' and Leopard 2KW III
14. 152mm ML-20S Howitzer: The main gun mounted on the ISU-152
15. 155mm M126A2 L/60 Howitzer: A modified version of the standard US 155mm howitzer you'll find on the M109 series of SPGs. The barrel length is based on the planned extension to make the current 39 caliber barrel to 58 calibers; I just took it a bit further
16. 183mm M21-02 Howitzer: Based on the 183mm cannon used on the FV4005 with improved ballistics