I work part time at a retailer, and we recently started carrying the BOLT M4. There have been quite a few players who have bought it that end up bringing it back because it drains batteries like nothing else, and it's noticeable enough that people think there must be something wrong with the rifle.
For $500 you can get a really nice VFC M4;
https://store.albertaairsoft.com/vfc...de-aeg/dp/2769