Your data is outdated. The M4A1 is currently the standard service weapon. The M4 burst selection is being phased out. I don't know to what extent that has been accomplished, but I do know the MWO is being carried out. Regarding those stupid slide fire stocks, I can't believe they were EVER approved by ATF. I knew as soon as I saw them, some twit would use it in a crime and kill someone. I never envisioned something like Vegas though. I figured a North Hollywood style heist or something. Having shot full auto a whole lot in military competitions and such, I was not impressed with "bump fire". It's a waste of ammo. If they banned slide fire stocks specifically I wouldn't care, but when sociopaths like Feinslime write such legislation you can bet they are going after match triggers, and will be pushing to make triggers break at 30 pounds.