Hey everyone, I just bought a M10-7 2" RB today for $239.95 in Sacramento, which seemed like an ok price. I did have some questions about this, however, since it's not only my first S&W, but my first 'older' gun. First of all, what does the -7 designate? I know the numbers after the dashes are design changes, but what exactly makes a -7 a -7? I THINK I've read somewhere that it places the date of manufacture around 1980? Also, is this a gun with the old lockwork or new? Also, does it have a frame mounted firing pin or hammer mounted? (I know I should've looked, but I didn't...) Is it safe to dry-fire? (I was dry firing quite a bit at the shop, and the owners told me it was alright to do so, so I assume they've let other people do it as well). Also, is it safe to shoot +P loads in it? I think I've read that the metullurgy had changed since the late 50's, so anything after that was alright, but I just wanted to be sure. The bluing was pretty worn at the muzzle, so I assume it's from holster wear? Any way to get it reblued as nice as it was from the factory? Lockup seemed tight all over, and although I wasn't able to measure the barrel/cylinder gap with feeler gauges, it seemed pretty small. The bore had some scratches, but no pitting...is this ok? Lastly, as for cleaning the gun, I only planned to take a brush w/ solvent and scrub the cylinder chambers and the bore, and wipe the thing down with a patch w/ solvent. Is this sufficient? Is there any need to actually take the thing apart ever to clean? Please let me know, thank you all in advance.