The alpha 220 and silver eagle strike me as a bit on the nose for the baretta and desert eagle. If they're intentially supposed to be future models of those guns, then the 220 feels plausible to me, but the silver eagle just kinda looks like a desert eagle to me.
The magnum blade kinda depends on the context. How serious is the tone of the game? If it's not very, then being visually imposing might be reason enough for it. Or is there an in-universe explanation for it? Like some niche use-case the manufacturer had in mind, or being modded by some meathead who just thought it looked cool? Or does it serve an actual gameplay purpose, like some kinda gun-fu shenanigans?
The second commando looks a lot better to me.
I appreciate the less bulky profile of the second carbine, to complement the more compact design, but something feels off about it to me. Maybe it's that the barrel isn't aligned with the ejection port, or that there's no space for the gas system above the barrel. I like the forward slanted grip in front of the mag well in both versions.