Compression Parts

[caker_chris]

I need to upgrade my compression parts in my gun and was wondering about the bore up kits. What are the pros and cons of them? And do they work in any mechbox? I have an ICS M4 split box if that helps.

[Horsem4n]

may be a bit late, but better than never.

bore up kits are for longer barrels. like, if you install a PSG1 length barrel in a regular AEG. other than that, there good for nothing else.