Glock is a great early spar weapon for newer players. Don't let it's cheap price hold back it's fame. Glock has slightly less freeze than m4, and can still beat an m4. Glock may deal less damage than m4, but it's slightly higher clip size and less freeze rate makes up for it. Other than that, it's rate of fire and spread is close to m4.
Glock is a great gun that can nearly match up to the other higher tier spar guns.