How to Bump fire a semiautomatic AR-15 from the hip
In most states getting a legal fully automatic rifle is impossible, but semiautomatic AR-15's and other rifles are much more readily available. If you're rocking a semi auto AR-15 your best bet for really fast firing is to bump fire it. Bump firing uses the recoil of the gun to pull the trigger, allowing you to shoot at full auto speeds with a legal gun. This video will show you how to do it from the shoulder.