Some yes, some no. AFter countless dryfiring and 8500rds of Winchester 147gr ammo, I had mine brake. Some others have had more than double that amount of ammo down range and no problems. Newer USP's have a slightly thicker firing pin. If you have the above amount of use, preventative maintenance wouldn't hurt. HK's are reliable and work great, but like any other pistol, they will wear out parts. RedLeg would know, as he rents them out at his range, so they get lots of ammo thru them. Flat spring is cheap, as is firing pin and spring. Extractors are brute tough, but may brake after extreme usage (very high round count), or using steel cased ammo (?)