You can, if you are inept and very unlucky both, get a similar failure in an ar-15 by failing to replace the cam pin in the bolt carrier after cleaning. Without the cam pin, it is possible for the bolt to slip into the barrel extension but of course it won't rotate and lock without the cam pin installed. You can imagine what nifty results you get after you've converted your AR from direct gas impingement to direct blowback. At least the flying bolt carrier has to fight its way out of the closed receiver before direct impact to the shooter. Was it American Riflemen that did an article on the old Ross Canadian straight pull battle rifle? The article said an improperly assembled bolt in that one could fire without locking up as well. It was rightly regarded as a serious design defect then when smokeless powder was still newfangled cutting edge technology.
