1 No exposed moving parts: all operating and cocking mechanism is sealed from debris.
2 Field strips in seconds. the gun can be striped in seconds, very few parts to loose. Although i takes a little bit longer to reassemble, with a litle practice its a cinch. The F4 Owners Group has got the skinny on this gun to every detail.
3 Good value: A good beginner / novice gun. For the price you get a solid, good looking gun that works great out of the box. The gun comes with an optional vertical adapter. Other than the barrel, there is no need to upgrade unless ya wanna look cool.
4 Reliable: This gun takes the abuse. Ive played countless games in the rain, cold and summer heat, and it has NEVER puttered out on me, even after constant and rapid firing (yes in the cold too).
Most of the problems are indicative of earlier model 99 F4's.
1. The trigger shoe kept falling off. The newer models dont have em.
2. A small batch older 99 F's 4 left the factory with flawed / faulty sears. if ya get one Call ACI up and theyll send ya a new one.
3. Few 3rd party COSMETIC upgrades.
As stated before this is a great gun to start paintball with. Reliable, meaning more time playing and getting better, rather than fixing and staying sidelined. Excellent gun out of the box. Ive had this thing three years and it still works flawlessy. Do yourself a favor, and get this gun