I honestly can't remember lol. Its been a while since I last used them I would have said no, I don't think they can which is why they are a separate issue piece and if I remember the plunger etc is different and there is a safety mechanism of some sort on it. But then when using them you have fit the blank fire adapter to the muzzle which primarily redirects the gas but is also capable of stopping at least one live round if accidentally fired. Hope this helps, Cheers. Sean.