Aero Precision M5 Lower Receiver Build Tips

So what about the rear take down pin with the set screw ? Are you actually supposed to cut the spring or no ?

I also used an Aero LPK and to be honest, I am a little concerned about how little of the threads on the magazine catch go through the magazine release button. I am used to them being close to flush.

Hey Parker I had a roll pin leftover that I'm not sure what to do with? I haven't been able to find any info on it, and also the rear takedown retention spring hole is threaded for a plug but when I actually threaded it in it made the takedown pin impossible to remove. Any idea what that ug is for?

Parker why dont you use a 308 mag release I have several M5s the stock part works great//////just my opinion "thanks"

thats wrong! your mag release is caught on the side of the receiver it will come all the way out

You forgot to mention the rear takedown pin detent and spring, that is held in by the world's smallest set screw… I yeeted that across the house 🤣 the gun is just lighter weight now haha. Held in with the handguard just like the safety detent

Hello what is the purpose of the Detent looking device below the rear take down pin. It almost looks like a buffer tube Detent directly below the rear pin? What is that?

Hello I have Aero precission M5 lower , from what company I can purchase my upper complete receiver? I call a gun shop they say any brand will work and other gun store said it will only work with aero upper receiver. Anyone pls able to help me which is what I need

Thanks for this video man

Use the real avid tool for pivot spring and detent

Have you shot that lower with the trigger yet? I have one on another 15 build, just wanted to make sure it would strike the primer. Love the trigger though for the price

I had the same issue with pivot pin, txt'd Aero Customer Support and their shop sent a 10 se video showing the process described. What worked in short time was noticing that the Aero Tec, while holding the punch tool in place, depressing the detent spring, was 'wiggling' both the punch tool and the pivot pin until the pivot pin 'caught' the top of the detent. to make sure I pulled the punch tool SLOWLY while keeping pressure on the pivot pin – and it popped right in.

Is the Rear Takedown pin detent hole tapped for a 4-40 x 1/8" set screw directly from Aero…???

For anyone wondering I just put together one with cmmg 308 lower parts kit and all the parts fit perfectly

If you are going to build AR-15 receivers, it's best to get the vice blocks for both the upper and the lower. You may think it's something you'll only do once, but you'd be wrong. Once you build an AR pattern rifle once, you'll do it again and again. Having the tools to do it correctly makes the experience much easier and saves you a considerable amount of frustration.

Dude what’s with the Bernie sanders mittens?

Good Job👍😎🇺🇸.
Where did you get the OD Green pistol grip?

Concerning the magazine release button (exactly what I was looking for when I clicked on this video) – it needs to stick up somewhat (at least) so the operator can push it down far enough to release the mag. The button should be flush with the raised section of the lower (in front of and above the button) that forms the fence. The button should definitely NOT be flush with the exterior of the recess in which it sits – that's too low. It seems they supply standard AR 15 catches that don't fit properly. The AR 10 lower is wider, so when you screw the release and the release button together, the release's shaft doesn't come flush with the outside of the button (as it does on an AR 15). This is pretty cheap. It gives the impression that the AR 10 mag release button doesn't have as good a grip on the release's shaft as it does on an AR 15. Until seeing your video I thought that maybe I had been furnished with a kit that had the wrong mag release with it. Unfortunately it appears that's not the case. They really should make the shaft longer. As it is on your build (and mine) there's a little well on the button into which crud can gather.

I find both takedown pins from the Aero Lower Parts kit do not fit in the freaking Aero lower!. Do you have to mallet them?

Nice job….appreciate the tips and info….I'm about to put one together this weekend….thanks for the vid stay safe 👍💪🙏🇺🇸

Thanks for the head up on the pivot pin; I'll be installing mine soon and I'm sure your tips will prove to be beneficial!

Glad to see people enjoying their freedoms

Thanks for the tip on the pivot pin. I started assembling mine last night and that is pretty much my stopping point right now.

Awesome 👏🏽