It does. Understandably traumatized witness said he changed mags in like six seconds and looked like he knew what he was doing. Sorry, only one of those statements can be accurate. My slidelock shot to shot time with a Glock was about 1.5 or less, I came into gun games in the ban era and played in the ten round Glock class. Mag changes didn't greatly alter rate of fire, but carrying six mags sure was annoying.