G&P M4s are good guns. Externals are top notch. The gears have a reputation for the posts breaking off so it's a good idea to make sure they're shimmed properly.
VFC is another brand to look into for M4s, good externals and out of the box shooters but have a lot of clear plastic internals. A metal hop unit is a recommended upgrade in these.
Both VFC and G&P areTM compatible so upgrades are easy to come across. Best two companies for M4s IMO (unless you want to get into PTWs).
Originally Posted by viking9934
buy one , cry once. trust me don't go cheap(like me and my *a&k ptw lol).