AR15 Upper Receiver - MWS Airsoft

This is an upper receiver model for airsoft guns.  I believe it is a replica of the Tokyo Marui M4A1 Carbine GBB upper.  It fits onto the airsoft lower that is also on my profile (https://makerworld.com/en/models/1986940-ar15-lower-receiver-mws-airsoft#profileId-2138044).  Even though this should be obvious, this is not a real upper receiver.  Even though the dimensions are very close to a standard upper receiver, this is meant for airsoft and is not intended for live rounds.  Enjoy!