How to build (assemble) ar15 upper receiver

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

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39 Comments

  1. Jesse Newman on October 28, 2021 at 8:33 pm

    Any issue with over torquing the barrel nut? SLR recommends 35 ft/lbs on all ar handguards.



  2. Robert Smith on October 28, 2021 at 8:36 pm

    I noticed that you didn’t dimple the barrel for your gas block retaining screws. Have you ever had a problem with the gas block moving after firing your rifle?



  3. RFXCasey on October 28, 2021 at 8:36 pm

    Wouldn’t anti seize be a better option as the grease will melt away with heat?



  4. ASilentUnboxing on October 28, 2021 at 8:38 pm

    What about head space



  5. Rocky Roads on October 28, 2021 at 8:39 pm

    Great video. Just finishing my kit and the dust cover won’t stay shut. I’ve tried a second one with the same issue. Do you have any suggestions? Thanks



  6. Mike Santos on October 28, 2021 at 8:40 pm

    Do you know of any manufacturers that offers a very heavy barrel like that?



  7. Professor Gallo on October 28, 2021 at 8:41 pm

    This is awesome, thanks for putting this together.



  8. anonymous caller on October 28, 2021 at 8:43 pm

    Great video. Just a note: spacing the gas block for a GI handguard retainer is only necessary for military contour barrels. The spacing is not necessary on most modern sport rifle barrels which are designed for free float handguards. Using a dimpling jig is the best and easiest way to insure best gas block alignment. These dimpling jigs can be purchased online for about $35. This comment is meant as an extra note not a critique. Again, great video. Thanks for posting.



  9. leo villa on October 28, 2021 at 8:45 pm

    Never use a torque wrench to loosen bolts. It will do it, but you will throw you wrench out of speck faster.



  10. TheWhiteDeath on October 28, 2021 at 8:47 pm

    Wow people love to grease everything!



  11. Thejuancarl on October 28, 2021 at 8:47 pm

    I actually feel confident on building a upper part by part , but one thing is how come some people leave out a small part of the gas tube stinking out and yours is aline to the screw



  12. brayden steen on October 28, 2021 at 8:51 pm

    Where can I buy holy moly grease๐Ÿ˜‚



  13. fmorelli on October 28, 2021 at 8:56 pm

    Congrats. When you apply grease to the threads you complete screw up the torque spec. Always a nice thing to do on a high powered gun!



  14. Pyro Shack on October 28, 2021 at 8:58 pm

    The grease on the threads change the torque value



  15. christian B on October 28, 2021 at 9:00 pm

    Did you just use your torque wrench to loosen the barrel nut?!!



  16. Raj Ko0thrapali on October 28, 2021 at 9:00 pm

    So what is gas block timing. I bought all aero precision parts.



  17. Remington Steel on October 28, 2021 at 9:00 pm

    Great video man. I have built lots of these and watching for fun. Spot on!



  18. John Pape on October 28, 2021 at 9:03 pm

    Short, sweet, right to the point. Just what I needed. THANKS BRO!!



  19. HexJK on October 28, 2021 at 9:04 pm

    I absolutely hate the roll pin on the gas block. It’s so awkwardly shaped, I had to duct tape mine to a table with a spacer under the lip so the pin can be hammered in at a level angle.



  20. THEGRAYFOXX00 on October 28, 2021 at 9:04 pm

    nice demo man. also fuck youtube.



  21. Blaine Terrel on October 28, 2021 at 9:04 pm

    Me with a Troy handgaurd that fits on old school barrel nut ๐Ÿ‘๐Ÿ‘„๐Ÿ‘



  22. SuperAWaC on October 28, 2021 at 9:05 pm

    Is the torque spec for dry or lubed? Because you need to modify the torque if it’s spec for dry or else you can easily overtorque. 65 ft lbs with lube is closer to 80-100 dry



  23. Austin DeMarr on October 28, 2021 at 9:06 pm

    Looking at building my first AR soon. (Own a prebuilt one now, want to build my next). Anyway, maybe it was just too fast and I missed it but how do I know the gas block is over the gas hole in the barrel? Also, does the Gas tube have a certain depth it goes back into the reciever? Or is it able to be moved so you can get the block over the hole properly. Thanks.



  24. Remington Steel on October 28, 2021 at 9:08 pm

    In my experience the gas tube always comes with the roll pin. I have damaged them and they can be hard to come by if that happens. Keep extra on hand before building.



  25. BreitfussJoey on October 28, 2021 at 9:09 pm

    Holy Moly๐Ÿ˜‚



  26. Clorox lavender scent on October 28, 2021 at 9:09 pm

    I wouldnt really use blue loctite on the gas block. It heats up pretty quickly. You might need to use a set screw. And then stake that. Loctite is affected by heat and the gas block is the hottest part.



  27. S Maximus on October 28, 2021 at 9:12 pm

    Thanks for the lesson. I’m a very beginner and just bought a 7.5" ar-15. I wanted to change the muzzle brake (looks like there’re many options that is better than birdcage it came with) but the part I need to unscrew is bit inside of the hand-guard (just inside to piss me-off, sorry). Is there a way to unscrew the birdcage w/o the taking whole damn hand-guard off? I appreciate your response in advance. Thanks!



  28. zqx357 on October 28, 2021 at 9:14 pm

    Thank you for the video. But I see something you did wrong. Sorry! Youโ€™re not suppose to loosen a tightened nut with a torque wrench. If you did that when I was in the Navy that wrench had to recalibrated.



  29. Michael Dread Andersen on October 28, 2021 at 9:15 pm

    You are aware that you only need to set the torque wrench to 30, loosen it, 35, loosen it again, set it to 40, and then you have fitted the barrel nut adequately…. Also, you forgot to dimple the barrel, when installing the gas block?



  30. TheMaverickSpawn on October 28, 2021 at 9:16 pm

    That glass block is cool; however, I recommend something that you can adjust without tools when you cake it up and need more gas to avoid failure to eject/load.



  31. marcelina noss on October 28, 2021 at 9:19 pm

    what make is your handguard? and do you have to purchase a particular barrel nut that corresponds to the handguards?



  32. steelbucks1202 on October 28, 2021 at 9:20 pm

    Who started the myth of stretching threads lol ๐Ÿ˜‚. Torque it and forget it



  33. Kyle P. on October 28, 2021 at 9:20 pm

    Do you think brake caliper grease would be good because it is rated for high temperatures?



  34. brando mercado on October 28, 2021 at 9:26 pm

    what grease are you useing?



  35. Jarrod Brandin on October 28, 2021 at 9:30 pm

    Where can you find that barrel?



  36. Dillon Quade on October 28, 2021 at 9:30 pm

    Should never look down the barrel smh…. jk good video Iโ€™m late to the party ๐ŸŽˆ



  37. bad guy on October 28, 2021 at 9:31 pm

    @15:43 you can hear some sort a demon moan



  38. Suburbannite on October 28, 2021 at 9:31 pm

    did your barrel not have gas block dimples on it for the 2 set screws?



  39. Jim Holmes on October 28, 2021 at 9:32 pm

    You Never use a torque wrench to loosen.