RustBucket - everything :-D . Seriously, the enhancements include a target trigger, flat mainspring housing, beavertail grip safety, probably oversized slide releases and safeties, skeletonized hammer, target sights, a contoured ejection port for more positive ejection and a fitted match barrel. For what you would pay to modify a government model to be on par with a loaded Springer you should be able to pay less for the loaded one. HTH. Mikey.