Magwells are designed to allow for faster reloading of the semi-auto by giving you a bigger opening that is flared and beveled to guide the magazine home. Is almost like, if you get close enough the magazine will just find its way in on its own. Most can be easily removed, depending on how they were installed.
no comparison to original trigger! this one is crisp, good quality and even adjustable - and this for a competitive price! recommended. would buy again.