I recently bought a AEG M-4, the ICS MP-15 has its ups and downs. First the pros. The gun its self has a 365fps shot (can be upgraded to shoot over 450+!) providing good range and accuracy impact. Its a split gear box meaning it comes apart like the real thing. Two flip-up sights one for close eyes to the sight and one for a farther comfortable view. It has a mag cap of 350 bbs. It also has a Gear reset button to keep your springs firm. Lastly it has a removable rail sight for placement of custom scope-sights or red-dots (dont buy acogs or 4x scopes its airsoft not cod acogs dont work the same). Now for the cons. I noticed that the gun can sometimes strip the piston forcing you to either buy a new gear box or repair it. When on semi auto pulling the trigger rapidly can jam the gun. lastly the gun does not come with a battery. PRICE:175$