While the dual-spring-recoil-system in the fullsize USP and the Mark 23 is more robust, and can handle a wider range of ammo (you can run anything from light target loads to full-house 45 Super loads without a spring change);
the single-spring+nylon-buffer-recoil-system in all the other current HK pistols is not only significantly less expensive to produce, but it also outperforms the dual-spring setup to a certain extent as far as sight-tracking and fast followup shots are concerned using standard ammo (no 45 Super for example).
the single-spring+nylon-buffer-recoil-system in all the other current HK pistols is not only significantly less expensive to produce, but it also outperforms the dual-spring setup to a certain extent as far as sight-tracking and fast followup shots are concerned using standard ammo (no 45 Super for example).