Where can you get a magazine rod for a 22 LR Browning BAR?
Correct terminology is 'inner magazine tube assembly.' The BAR22 and BPR22 used the same part, we occasionally have them for around $23.
.22 caliber pistols use a "single stack" magazine- each cartridge is directly on top of another, unlike the Browning Hi-Power, that has staggered cartridges. 10 rounds, and the magazine follower and spring are all that will fit in the butt of most pistols. In addition, some states have laws limiting the capacity of a magazine. Why THAT is, you will have to ask the politician that passed the law.