The Hi-Power was/IS a good, original design. Nearly all modern semi-autos use the Browning Locked-Breech Short-Recoil design, but that was a design feature developed by JMB years before he was hired to work on the Hi-Power. FN was the first gun maker to use double-stack mags in a high-production gun, but it It took another 35-40 years before other gun makers got on that band wagon. (I suspect that change was probably more due to Glock's use of hi-cap mags in the Glock 17 than FN's use of hi-cap mags in the Hi-Power.) The Hi-Power, internally, has virtually NOTHING in common with the CZ-75 -- except double-stack mags; the 75 just looks a bit like the Hi-Power.