G&G Combat Machine CM16 SRS Airsoft M4 AEG Rifle with Keymod Rail (Package: Black / Gun Only)

"Some exterior parts on the gun came packaged loose. I had to tighten them myself. Also the gun doesn't shoot even close to 370 to 400. Well atleast mine wasn't it was only shooting 340

"Gun only shoots about 340. And some of the components came in the box loose. Also I can't get my battery back out.