As far as I know , Collectable Card Game typical trading card game , I believe and Living Card Game which basically has a full base pack and specific expansions rather than the random card packs . I googled LCG and that was the third result . <| sep |> The superchargers portal had a similar issue if it was sitting on a surface that had metal in it . If that might be the issue , then place it on a thick book or empty box or somewhere else with no metal nearby . <| sep |> Just as an FYI some ranges are hard nosed about rifles on the range it ' s not necessarily the ammo they have a problem with , it ' s sometimes an issue of ' these are pistol lanes , no rifles '. I have been places that would not allow a ' pistol caliber ' rifle in , the argument being that the additional barrel length made the round rifle powered and therefore not suitable for a pistol range . So you might check . If you are building a pistol AR in pistol caliber , then maybe it won ' t make a difference . If you are building a pistol AR in a ' traditional ' AR caliber it might make a difference , if you are building a rifle AR in ' pistol ' caliber , maybe they will make a stink . I assume from your post that you are building in pistol caliber , which could be different from building a pistol so I figured I would mention it .