You dont need any, but i guess if you were to get one, get a new barrel
Strengths:
Extremely light, most accuarate gun i've ever shot, and powerful
Weaknesses:
The aiming, you may want to buy a sight for it
Review:
I just got mine today, and i cant even begin to tell you how happy I am with it.
when i fired it, it was either on target every time or at least very very close to it
The barrel looks custom and performs perfectly already, i see no need to replace it
Maintenance is easy, as is adjusting the velocity with the barrel accessory
It looks sleek, and feels like a rifle when holding it
Conclusion:
This is by far the best pump for the money out there, i couldnt believe how powerful and accurate this thing was, and I'm very h appy with it. I give it a 9 because of the aiming, go get a sight for it
