Jimenez Arms bought the machinery from Bryco Arms, which used to be Jennings Arms.
The Jimenez JA-22 (same as the Jennings J-22) is a little rougher in the action. Once you get the pistol, give it a good cleaning, keep it fairly oiled, and keep a good grip on it. It does not recoil much, but any small amount of momentum wasted from a slight limp wrist may cause a short cycle (not much mass in those tiny slides).
Also, these pistols work best when using 40 grain solids, such as CCI Mini Mags.