None, maybe a barrel, but the stock barrel is dang good.
Solid workmanship, life time warranty. See below.
Your kidding right??
Well I finally broke down & bought a CCM series V. I'm not much into bling , I held out for a long time. Maybe part of me knew that it would ruin me.. It has. I have never had a pump that was so smooth , words cant describe it , buttery is selling it short. Very consistant no more than +/- 5 fps max. Solid accuracy I think better than any other pump that I have ever owned. With the speed of the pump stroke and the autotrigger I have no problem going against mech semi's. I havent had any issues with the marker yet , but I can already tell buy what I have seen that the CCM guys will do right by me if I ever do have an issue.
With how great this marker is I cant help but feel that any marker from CCM will be good. If you can get your hands on a series V get it. they quitely get the job done with a classic low key style. Kind of like a black tux .