"It can be made satisfactory for use by a SWAT sniper."
Sir, you're fooling yourself. The only LEOs I know of that use the Ruger Mini series of weapons for anything are people employed as prison guards by the various DOCs. Why? Because their use for them is at extremely short range where inaccuracy does not matter (10 MOA accuracy is OK when your target is only 50 yards away), and they have a less-sinister appearance than, say, the AR series of weapons. Well, that, and they're cheap. Anybody, and I mean ANYBODY, who relies on the Ruger Mini series of weapon for any "serious social purpose" is a fool. You'll get more accuracy from the most crudely made and primitive AK clone out there.
As noted in a prior post, I prefer the Savage 12FV in .223 with a good B&W Elite 10X scope on top. 10 rounds through a single hole at 100 yards is effortless. The 12VLP in Ruger 204 is even better.