What in the wide, wide world of sports have I got here,,, this is the most accurate hand gun I have ever seen. It about takes a pipe wrench to just field strip it. Note the extra chunk of metal in the slide that puts the barrel in place while in battery. Definitely 'old school' trigger stop, the bushing is after market and the barrel looks machined for it. The slide is ,,, tight is an understatement. Old school pin gun? Built by who?