is it true that a proper 1 calibre pistol exists? I have heard tales, and after being astounded by the power in a .50 calibre sniper's rifle, I just have to find out if there is even the possibility of a real 1 (no decimal, actual 1 calibre)?
Also I am British and I aren't really a fan of guns, except for the BR and needler

If I had to choose a real world gun, I would go with a standard pistol, worked on of course, preferably chambered to fire 9mm rounds, roughly 12 - 15 clip capacity, standard iron sights, undermounted flashlight/IR laser 2switch variable, with a customised kraton/grivory grip and personal art design over the barrel, which holds an extruded end piece, with counterweights across the top, everything except for the hand grip finished with a dull, understated silver, probably Ag(ii)O mixed with the barest minimum of Cr for a "candy paint" finish, (IE small shiny flecks of shiny chromium)
Once again I mentioned my actual distaste for guns, personally I find them to have become a tool of criminals and fools (and the US army, but I am unsure if they don't actually qualify for either of the aforementioned groups, considering my sister, brother in law and brother's experience of them has been in Iraq and Afghanistan, before anyone gets their knickers in a twist, I DO appreciate that what they are doing is somehow serving the greater good, I mean all but one of my siblings have all been over there, and I respect their bravery etc etc), the remaining people who appreciate what a gun is used for are in the minority in comparison to the thugs these days, especially here in England, my own personal experiences with people wielding guns has always ended quite hilariously, people seem posessed of the belief that if they hold a gun sideways pointed at your chest then you are suddenly going to just hand over all of your money, on the 2 occasions that this has happened, I was able to quite quickly disarm them and get rid of them, the second one actually ended up with his own gun pointed at him, wasn't so much of a tough guy then!
I of course turned in these guns at a local police station (Burnley and Kent to be precise) and went about my way, if the people wielding guns here in the UK are so fucking stupid that they can't even pull off a decent robbery without losing their own damn guns, or 30 litres of piss for that matter, then they don't deserve one.
Which is exactly why I prefer hand to hand, and in extreme cases, combat knives, what is your position on the last 2 paragraphs?
Part one: could you answer the question on the top (pics if possible)
Part two: could you provide an example or detailing of how good/terrible such a gun would be (pics again) as well as a suggestion of where someone living in the middle of england could obtain such a tool?
Part 3: Are guns entirely necessary? the only people I have met with them in the real world are idiots and my family members (often one and the same), I have personally fired a Beretta 9mm, Remington 870, a MAC 10 and on one humorous occasion, another Beretta 9mm, with the one I fired before, at a single target... and didn't do as terribly as the instructor said, primarily because I was actually aiming the damned things like one should do with dual wielded weapons (37 degrees inwards to the centre of the line of sight, barrels at 30mm distance from each other, close-eye checks on each barrel being properly lined up with the target)...6/10!
Part 4: Could you provide some perspective on the situation with guns in america, and do you believe that there is a way guns could be regulated properly in this day and age?
Thank you for any pointers, help, tips and insight you can provide, it is always good to share and network ideas, its getting me through university right now

(and yes that means im liberal biased)!