I do not own a bumpfire stock. I have shot an AK-47 clone with one. The same principle as the bumpfire stock used on an AR-15 clone by the mass murderer in Las Vegas.
The Firearms Technology Branch (FTB) of the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) reviewed the AR-15 version of the bumpfire stock from Bump Fire Systems. The determination is in a letter dated Apr 01 2012 that was sent with the stock I got to shoot. The determination for the Slide Fire product which appears to have been patented first must be similar. Continue reading