doi:US2599839 AKeifer Jr., Frederick JUSUS2599839 * Oct 26, 1949 Jun 10, 1952 Keifer Jr Frederick J Rear sight adjusting device for pistolsUS2599839 * 1949年10月26日 1952年6月10日 Keifer Jr Frederick J Rear sight adjusting device for pistols...
Now that I realize how precisely the mounting system would have to be machined to have it removable with repeatable accuracy, I have given up. Removable riflescopes are machined very precisely. This mount is a fairly crude casting, so there is no hope of removable accuracy. It may be fine...
The rear sight has two blades adjustable on a bracket, and movable to and from each other to give continuous symmetrical adjustment of sight width. The adjusting mechanism is a rotary drive, to which the thin flat plate-type blades are directly coupled. The blades can be integral parts of ...