Classic Army New M4 SPR A.E.G.

"Also Jake, as for this gun, you will want a Intellect Battery and if you can order the barrel from somewhere else, I would get a DB Custom/Dee's Barrel thats 6.01 mm in diameter. My friend has this gun and its amazing, just dont go trigger happy with it because you will have to repair it because of gears stripping. Also make sure you use Excel .23g bbs. nothing else, not even the matrix .23

"Ive had this gun ever since it came out and I gotta say that I love it!!!
I put a Systema M120 spring, Systema Normal Helical Gears, and a classic army high speed motor in it. With these upgrades you will be a juggernaut! Mine shoots straight for what seems like miles compared to other guns. You should definitely buy this gun!

"i want to buy this gun in about a month or so. it looks really good and if any one can tell me what i would need to get to upgrade the spring email me .