"Icon_OSRNew1"? Plus that copied CI file.
A couple minor things:
The shell debris is unnecessary since it's directly copied from the Gun which you're force-requiring anyway.
Missing texture "./smoke".
Muzzle velocity is limited to 200, your 1000 might cause console errors.
No way to partially reload.
Using $DamageType::m200 which doesn't exist
gunTrailEmitter does not exist. bulletTrailEmitter is the closest equivalent but that was removed in Blockland v9.
echo("reload?");
The projectile does 75 damage normally, not 50 as in the first post
Lots of copied code in the firing function
Spreads even when not moving?