Well I have decided to go with the M4. The reason is for function. I am building it to shoot fast and accurate at close range. I would rather have a very good regular barrel and have ball on ball accuracy at 150 feet. I have been playing a lot indoors at the Gooseberry mines in Reno Nevada so the rapid fire and short compact marker is what I need.

__________________
At some point everyone...... gets sent home in a body bag!

WWW.undergroundmodshop.com