The 21° degree framing nailer uses a 21° degree nails clip. The angle of the magazine usually varies between 20°-22° degrees. So it gives users the multiple-choice to adjust the angle according to his/her work requirement. It is a common angle.
The 30°-34° degree nailer is lighter in weight and is very useful and handy in the tight spaces where a 21° degree nailer does not work. The framing nailer at this degree holds nails with a paper strip.