[Ripon]

80% LOWER RECEIVERS

$90-$100 and reviews suggest they are pretty solid. Best part is you can have them shipped to your door with no FFL or paper work. They are just paper weights right now, but with an hour of milling, a lower parts kit and complete upper they'll work just fine.

 

[Inor]

I have been drooling over a couple of the 80% kits for about a year now. Until recently, I did not have a drill press that I trusted to be accurate enough even with a good jig. But I solved that problem a couple weeks ago with a big monster Powermatic. So, maybe this year?

 

[inceptor]

I have an 80% but I have to have time to get to it. :lol: Actually I have 2 others to build also.

 

[Rigged for Quiet]

I have an 80% but I have to have time to get to it. :lol: Actually I have 2 others to build also.

It finally got here?

 

[inceptor]

Sorry, I thought I told you. It came in late October. It's sitting in my safe right now.

I just remembered, my back went big time about the middle of October and I just am back to normal (well, as normal as I'm capable of anyhow) so it is possible that I didn't. I know I knew I needed to tell you and I thought I had. Sorry. I won't do anything with if for a while. The wife's got me busy in the house. My bro was living with us and he passed last Feb. I am finally about finished going through his stuff and have that room darn near empty. I still have a lathe of his I need to get listed on Craigslist. The Mrs plans to use that room as her study so she is after me to get it done.

 

[Rigged for Quiet]

Well, if I've slept since then, it's possible you did PM me and I forgot! I remember there was something about instructions or some such. Cool that it's finally here, that was the hard part, so far!

 

[inceptor]

Oh yeah, see what happens when you get old? Now I remember, I was waiting for the you tube video to be released. They finally got to it according to their fb page.

 

[Rigged for Quiet]

What were we talking about again?

 

[Meangreen]

I have been working on some 80% AR15 receivers and I say receivers because I have screwed up a couple. I have a machinist friend of mine helping me out but it's wicked hard work. I found really nice kits from centerfiresystems.com and what I'm trying to build is a Vietnam era replica A1.

 

[Inor]

I have been working on some 80% AR15 receivers and I say receivers because I have screwed up a couple. I have a machinist friend of mine helping me out but it's wicked hard work. I found really nice kits from centerfiresystems.com and what I'm trying to build is a Vietnam era replica A1.

Other than the obvious jig with the templates, do you need any special toolings to machine them?

I did find a couple places that sell trigger groups already assembled, so all you have to do is set them in and add a couple screws rather than dealing with assembling all of the spring and goofy other parts. I think if I can get it that far, the rest should be easy.

 

[Meangreen]

Other than the obvious jig with the templates, do you need any special toolings to machine them?

I did find a couple places that sell trigger groups already assembled, so all you have to do is set them in and add a couple screws rather than dealing with assembling all of the spring and goofy other parts. I think if I can get it that far, the rest should be easy.

I don't have a jig or templates. The master machinist I'm working with insists on working from blueprints and using mill drill combination machine. I don't think I could do it myself nor with just a drill press. Please keep me posted on your results. When i complete one I will post pictures.

 

[inceptor]

Got mine from here

Polymer80 | AR Polymer 80% LowersPolymer80 - AR Polymer 80% Lowers | Polymer80

Still in the safe, haven't had time to touch it yet. The do offer a guarantee if you mess it up, they will replace it. So I figured I would give them a try. Now they have video instructions too. I'm more of a visual kinda guy.

 

[Meangreen]

Got mine from here

Polymer80 | AR Polymer 80% LowersPolymer80 - AR Polymer 80% Lowers | Polymer80

Still in the safe, haven't had time to touch it yet. The do offer a guarantee if you mess it up, they will replace it. So I figured I would give them a try. Now they have video instructions too. I'm more of a visual kinda guy.

Are you using a jig and template?

 

[Inor]

Got mine from here

Polymer80 | AR Polymer 80% LowersPolymer80 - AR Polymer 80% Lowers | Polymer80

Still in the safe, haven't had time to touch it yet. The do offer a guarantee if you mess it up, they will replace it. So I figured I would give them a try. Now they have video instructions too. I'm more of a visual kinda guy.

That looks like a better kit to start with! I was looking at these guys:

Home - Ares Armor

They are made from Billet aluminum. So, I am guessing they are higher quality. But the jig is also about $100 (but is reusable). I think I will eventually try one of them. But as a first step to get the process down, the polymer one looks like it would be perfect.

 

[inceptor]

Are you using a jig and template?

The jig/template are built on it. It comes shipped that way. Damn, ya made me watch the video.

Well, I gotta pick up a new vise.

 

[Meangreen]

80% 7075 Aluminum Billet AR-15 Lower Receiver Blank | Genesis CNC

This what I started with.

 

[inceptor]

Mine is polymer, not aluminum. I wonder how much harder it is to work or is it harder? I have never tried anything like this before so it will definitely be a learning experience.

 

[Meangreen]

Mine is polymer, not aluminum. I wonder how much harder it is to work or is it harder? I have never tried anything like this before so it will definitely be a learning experience.

What I mean by harder what type of bits will need to be used to machine polymer and be able to keep all work within spec (holes round and crisp and not oblong or rounded edges? The material is of course different from aluminum so will it melt or deform? I destroyed my first receiver because I got inpatient and broke a bit that in turn blew out my trigger well. It makes an interesting paper weight on my desk.

 

[inceptor]

Oops, thought I posted the video. They list everything you will need in the beginning then show you what comes with it.

 

[Meangreen]

Wow that looks way easier than what I'm doing. I should buy one and give it to my friend for Christmas just to piss him off. I will include a coloring book with crayons.