The rifle comes with an M110 spring already installed, it's fully functional and ready to go. All you will need is some new batteries.

I will be selling a G and G full metal high capacity magazine (450 rounds), the angled foregrip attachment, and a Tamiya battery charger which has an attachment to charge the battery in your car if need be!

Only defect is that a little nub on the other side of the fire selector has fallen off as you can see in the image. Doesn't affect anything and could be easily replaced.

All in all, an absolutely solid rifle with fantastic performance that has served me well.