Notice, also, how the narrator changes the topic from 'firepower' to 'rounds per clip' when talking about the differences between the two guns. This whole video smells rotten.
You coulld see the muzzle jump with the second gun. I think it was firing live rounds, but apparently not at the cinder blocks. HOWEVER, the narration by the Sheriff says the second gun only has a 10 round magazine (which he incorrectly calls a clip at one point) It looks like a standard 30 round "banana" magazine to me. Unless someone goes to the trouble of making a 10 round magazine from a 30 round one, by welding in some sort of stop so that you can only get 10 rounds in it, the sherrif is full of Shiite. Well even if they do, he still is. On an early thread it was stated that the "Sheriff" (actually EX sheriff) was appointed by Governor Bush's predecessor. In Texas we elect our sheriffs, and in states that don't it's usually the county board or court (whatever the state may call the governing body of the county) that hires the sheriff. The ex sheriff was some kind of political bigwig in the state legislature before becoming sheriff. Naturally, the ex governor and the ex sheriff are 'Rats.
Unfortunately Sheriff Ken-Ken (5'2" in elevator shoes) isn't an ex-sheriff. He is the CURRENT sheriff of Broward County. And a very POWER-HUNGRY Sheriff at that. Sheriff Ken-Ken is currently trying to take over the Fire Department here as well.