Some airsoft weapons are equipped with 'blowback' which simulate the real slide action of a authentic pistol. I recently did a lot of research wanting to get into airsoft since it is more realistic than paintball and provides a better user experience.
www.redwolfairsoft.com
is a great place to look up some 'guns', the site is somewhat difficult to navigate at first but once you get the hang of it, it's great.
Good luck