I do not advise the slap method. Once my girlfriend loaded my AR in such a fashion and managed to push the magazine up past the mag catch. A good pull got it back to where it used to be but in a "need rifle to work right now" situation it would be bad news.
push pull. press bolt release. enjoy.
"No, it's not a silencer. This little doodad is my own invention. I call it a loudener." --Sledge Hammer