What Is The Best AR-15 Upper Receiver?

I would argue forged is lighter. Especially noticeable in a lower forging.

Are FCD suppressor optimized uppers really a difference maker? (I don’t think that’s the name but i don’t remember the name)

Building ARs is just fun it's basically adult legos

There is nothing wrong with rattle. I've seen a M16 which visibly flopped from side to side shoot a 2 inch group at 100m with irons. Get gud, scrub.

I'm collecting parts right now. I hope it comes out like I want it to.

I have no idea what “receivers” are!🤣
Just hoping that I am the Winner of the current Contest!🎉🎉🎉

LoL a detent

AGAIN…. Aero does NOT have matched sets….

Does anyone make a striped bolt action receiver set?

My favorite uppers for AR-15 is all of them! Please reply, Clint!

Any thoughts on the fostech lite upper receiver and lower made from magnesium and aluminum alloy?

Clint the Cz Bren 2 is what the SCAR 16 and ACR wishes it could be

Didn't mention feed ramps. 🙂

Had to send my M4E1Aero 18 inch back due to a gas block issue. Wouldn’t cycle.
First Aero build and she looked sexy! Just wouldn’t work :/
Their customer service sucked as well. They acted like they didn’t care.

Where’s Alek?

Try fitting a mk8 rail on a vltor upper. Vltor uppers thicc. God clint didn't even mention JP or BCM undercutting their barrel hole for thermofit.

🐐🇺🇸💯💯🪖🚀🚀🦍🦍🚀🚀🪖💯🇺🇸🇺🇸🐐🐐🇺🇸💯🪖🚀🦍

I work with aluminum for a living and 7075 is some really strong stuff compared to other series like 1xxx,3xxx, 6061 and so on.

…let's make something completely new , experiment polymer receiver i saw today fits here need to merge the ideas together making something totally new and improved

What handguard is that?

Bottom line…….What's in your wallet? Gucci or GI? Or somewhere in between?

Bruh I just looked this up yesterday on y'alls channel, crazy that one day later you released the video lol, love yall

I need all the parts listed to build that SCAR to your left right now!

I swear by aero precision. I can’t afford BCM and AERO is a covert supplier to BCM.

Forged is lighter.
Billet is heavier.

I don't know about everyone else but I always have the upper receiver trued up and blueprinted. I've got a.204 Ruger and 6.5 Grendel that are insanely accurate. Aero Precision is my absolute favorite.

I wanna know what y'all think about polymer lower ar receivers??

Me as a lefty: Should I get the Stag Arms upper or the Stag Arms upper?

The Aero m4e1 might be more durable but that's not the reason to go that way.

Almost all "rails" are free floated which means they don't contact the barrel except at the barrel nut. This is a great thing for accuracy except if you load the handguard by pressing against a wall, barricade, bipod or hand stop, then the rail becomes a lever trying to bend the barrel (nut) away from the upper receiver. Since your optics are mounted on your upper, that creates a POI (point of impact) shift, throwing away some of that accuracy the free float handguards give you.

So the goal is to have a super stiff connection between the barrel and the flat top upper receiver picatinny rail. From a material science standpoint the alloy and forged vs. billet matters very little because stiffness is determined by the geometry and the modulus of elasticity which is very similar among all aluminum alloys. The tensile strength where 7075 and forgings have an advantage does not make them stiffer (hard to believe but true). The relationship between geometry and stiffness is easy to understand, a skinny bar of steel is easy to bend while a large diameter thin wall tube is quite rigid.

The inverted barrel nut of the Aero M4e1 upper allows the front of the receiver to be a lot larger in diameter than the standard AR15 snout, that increases the stiffness and allows the handguard loading stress to transfer to the upper directly rather than through the barrel nut which I believe is probably another good thing the inverted barrel nut system does.

The Aero also is 7075 which I prefer because why not have higher tensile strength, but if it was 6061 it would still be my choice because the stiffness would be equal. If your rifle gets stressed enough to exceed the strength of 6061 aluminum, you have bigger problems than the alloy your upper was made of…

I have a couple palmettostatearmory pieced together guns, mostly 300blk. I plan on doing a full fresh build where I pick what parts I want now that I have more knowledge about everything 😌 gonna be fun for my next 2a adventure

If you don't make your 300blk build piston driven I will be surprised Clint.

Yea if u have the money yea y not built another AR not the same with most of us that it’s not the easy and simple

What happened to Alek?

Mega Arms megalithic or any LMT upper.

Clint I want to know what you would build a 350 legend upper with , I am going to hunt with it and have a Cmmg 200 series that I will put it on , I would like a side charging upper but it’s not necessarily a requirement

Milspec + 7075 T6 = good to go. Everything else is fluff. If you wanna pay more for added "features" or maybe a nicer finish or a certain logo on the side, knock yourself out.

What gas system did you put on the table