pretty much anything, ive used low quality zap and higher quality RPS and Draxxus
Accuracy of course
ability to match your paint
sometimes hard to get off your gun as it is very smooth
I have had this barrel for a decent amount of time, i got it pretty much as soon as i got my gun. This product has done nothing but positively affect my game.
Accuracy: even though it only has 3 backs you can still get a mighty decent fit with pretty much any paintball. From approximately 20 feet away (my backyard) it is very easy to get ball on ball accuracy with no aid from a rest, just holding the gun and shooting normaly. From this distance the paint splatter is generally within 2-2.5 inches. At the chrony station there is a target about 50 feet away. Without using a rest of any kind i can get all the balls within about a 5-7 inch circle. The grouping would probably be much better if i had a gun with minimal kick but this is with a low end piranha so its pretty friggin good.
Looks: This is a very simple looking barrel, silver back and black front with straight porting and a small amount of milling on the backs. It is nothing extravagant but it is a very appealing barrel. It has a very smart looking Mac Dev jewel on the two fronts.
The only negative things I can think of when it comes to this barrel is that
a) when it is screwed onto your gun it can sometimes be difficult to get a firm hold on especially if you have paint on your hands.
b) If you ever play in a concrete wharehouse be careful as to not bang it as you will most likely dent it. I was playing on an indoor field with just a back so i could play super tight and when i slid on the concrete floor which was very slippery from paint my barrel hit the gorund and got a small dent on the edge. But most people will not do this so ya.
This is a great barrel i doubt u could make one better but it is not *PERFECT* as almost nothing is so it gets a nine.