The 4516 is an outstanding piece. I have heard that the real early units (4516, no dash number) had a problem due to the lack of slide mass (the 4516-1 and -2's have a slightly larger slide), but have not personally confirmed it. I have owned a -1 and -2 which were both excellent, but traded them both off (the -1 for a foolish reason, the -2 for a good reason, traded it for the 4556 DAO version of the 4516). I have done a fair amount of "side by side" testing of this compact pistol with the larger Smiths (4506, 4576, 4586), and can confirm that "felt" recoil is less on the little pistol. This is due to the double/nested recoil spring design that the compact pistols uses. Great package! You should get years and years of good service with the 4516. ......SmithNut