This is a true collector's item from H&K, their P7 M10 in .40 S&W.  The barrel is fixed to the frame, in fact, from a natural point position you are looking directly down the barrel.  This gun is in new pristine condition with the original factory grips, box, and paperwork, comes with three nickel and one blued mags.  Only 4000 M10s were made and of that very few were made in a nickel finish.  There's no other pistol like it that's for sure.