[@Gun][@dirty slime]
Magnaangemon's shield is not a physical object, but rather a magical force field. It does not consist of molecules, or atoms, and therefore the V particle wouldn't be able to destroy it.

Ultimate level Digimon are nowhere near Saiyan Saga Goku. Saiyan Saga Goku was just below planet-level. That's a level of power only reached by the likes of Palidramon and Susanoomon, both of which are Megas, and powerful even among Megas.

Magnaangemon's durability is similar to that of a high-powered futuristic tank. Standard ultimate-level Digimon are able to shrug of AP missiles, and Magnaangemon is significantly tougher than that. His toughness thus allows him to survive fairly massive amounts of damage. You'd need something like a miniature nuclear warhead to take him down.

Magnaangemon's speed is approximately Mach 1.

Magnaangemon's weapons are strong enough to tear through reinforced steel like it's butter, and only super-metals really have the toughness to resist them. They're also super-effective against supernaturally evil beings.

Just to set up a couple of stats for Magnaangemon, as a devoted Digimon fan. He's incredibly powerful, but not unstoppable.