I really wish people like Benny Blonco would stop posting regarding paintball markers when they have no idea what they are talking about... but such is the life of an open public web board :( There are many different online stores, 888paintball.com, ...
Both markers should have that information along with much more in their owner maunuals to help you understand your markers better. Both of those markers are the common double stacked blow back designs so the velocity adjustment is in the rear bottom ...
2 main types..... Blowback type which runs on high pressure, this style is louder and fires harder...... not a smooth firing marker...... most cheaper markers are double tube stacked high pressure blowback style like Brass Eagle, View Loader, Spyder,...