Looks good! Depending on how much room you have to work, you might want to swap the rigid pipe for a 1/8 NPT flexible hose. They generally come in 12" and 18" lengths, rated for 5000 psi.
Made in the USA counts for something, but there's probably not much if any difference in any of the $20 grease guns, be it Alemite, Plews or Lincoln, etc. The Plews 30-465
has the same refill features (cartridge, suction or pressure), has a pressure relief valve, etc.
My oldest grease gun has "Made in USA" on it, but no brand name. Same basic lever action design but lacks a pressure refill fitting and the bleeder requires a screwdriver. Easier to just crack the seal by unthreading the head a turn or so.