How to build (assemble) ar15 upper receiver

This video shows how to install the barrel, gas block, and handgaurd for an ar15. I did not show the upper parts kit or muzzle device im sorry "DISCLAIMER: GunsWithGage videos are strictly for documentary, educational, and entertainment purposes only. Imitation or the use of any acts depicted in these videos is solely AT YOUR OWN RISK. All work on firearms should be carried out by a licensed individual and all state and federal rules apply to such. GunsWithGage and YouTube will not be held liable for any injury to yourself or damage to your firearms resulting from attempting anything shown in any our videos. GunsWithGage is not a gun store and DO NOT sell or deal in firearms. Such a practice is heavily regulated and subject to applicable laws. These videos don't include any instructions on manufacturing firearms, assembling parts, or installing prohibited accessories like bumpstocks, gatling triggers, auto sears or any accessory that allows a firearms to simulate full auto fire. Our Videos Don't link to any websites that sell firearms or firearms accessories. This video also doesn't contain any discount codes, nor does this video promote the sale of firearms, bumpstocks, gatiling triggers, binary triggers, auto sears, magazines with a capacity greater than 30 rounds, or any other item on YouTube's list of prohibited items listed in their Community Guidlines. We DO NOT sell parts, magazines, or firearms. By viewing or flagging this video you are acknowledging the above. "