The tinfoil hat interpretation is that rifles are far more effective in both battlefield (full barrel) and urban warfare (carbines) than sidearms, and confiscat

The tinfoil hat interpretation is that rifles are far more effective in both battlefield (full barrel) and urban warfare (carbines) than sidearms, and confiscating them removes the last chance any populace has against its own government. Such that it's in the interest of despotic regimes to do so. Private ownership of battle rifles (c.f. Vietnam, Afghanistan, Iraq insurgency) are pretty much the only (valid) defense against the "Lol you think you can fight a war against an adversary with drones and nukes?" argument.