pretty much any kind just match the paint with the bore
Strengths:
Accuracy
Looks
Very light
Very quiet
Weaknesses:
I honestly havent found any
Review:
I was a bit skeptical about getting this barrel system because they were so rare and there were so little reviews, but Im glad i got it. I got mine brand new off of ebay for $51 and I think it might be the best barrel system ever made. I can hit almost anything with this barrel it has just been wonderful. I mean i have even shot ppl that from about 50 yards (no it doesn't add range) but the ball will stay straight no matter what the distance.
Conclusion:
It is dead on so if you get a good deal on this like i got make sure you buy it because i honestly dont think you will find a better barrel. I would give it a 9.5 because nothing is perfect but im gonna bump it up to a ten cuz it is so great.
