nukeduster did a review on a gbbr woc m4 that is similar to the one ur looking at and i think after some trade/sales from people i ended up buying it from someone as far as the gun is its a good gun but may need a few upgrades if u were to but it new and the mag that came used with the used woc was unfixable so it will be used for spare parts other then a few things that needed work on the one i bought its a good gun i would suggest googleing the G&P woc's for more info if u dont get any responses
