I really like my USC/UMP. The trigger sucks but you can do only so much with polymer. That should be designed with all steel FC parts. For practical purposes it is like comparing an AR to an AK. I do also have a .45ACP rollerlock gun and the trigger is better and due to physics of a delayed roller mech, it is more fluid but accuraccy to 100m is the same as the UMP. The recoil thing I do not get. It is not that noticeable to me even with a sear in the .45 rollerlock nothing to speak of except it is faster than a MP5. I got the UMP because of the caliber. 9mm will never be able to outperform .45 but I have no desire for a UMP in any lesser caliber. For 9mm i'll stick with the MP5.
Yeah the recoil thing I don't get either. NO one complains of recoil in a 1911. So why in a shoulder fired carbine? It sounds more to me like operator error. No offense to anyone.
40 bolt, 40 barrel rechambered to 10mm, TN grease gun lower and grease gun mags. Works great once you get the feed lips on the grease gun mags right.
This is my experience rapid firing both, I'm certain the difference is much more discernable with a happy switch.
Holy back from the dead thread!!! Jesus. I can say that my views on .45 have changed over the years. Don't much care for it to be honest. And I do not feel underpowered with a 9mm. But wow. Didn't realize this was a 7 year old thread.