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KevDen2005
06-29-2016, 11:46
Has anyone ever used one to complete an 80 percent lower. I think it would be fun to build a couple of these but don't want junk. Also, feedback on how easy it is to use would be nice as I am by far not a manufacturer. I have all the other tools required. Here is the link below.

http://www.80percentarms.com/collections/lower-jigs/products/80-ar-15-easy-jig
rondog
06-29-2016, 12:08
As a former machinist, I'd love to know what all's involved in completing an 80% lower. All I can imagine is screwing it up horribly without having a milling machine to work with.
00tec
06-29-2016, 15:08
Sending PM.

Great jig though.

I have done a few on that jig. Have one handy if you want to look before buying a lower.
OneGuy67
06-29-2016, 15:12
Kevin, I own one of these. You are welcome to borrow it.
Wulf202
06-29-2016, 15:48
They're good to go. Watch out for the different types of aluminum. They require different techniques
Irving
06-29-2016, 16:03
Kevin, I own one of these. You are welcome to borrow it.

Same. I have a jig somewhere.
Buff
06-29-2016, 16:25
As a former machinist, I'd love to know what all's involved in completing an 80% lower. All I can imagine is screwing it up horribly without having a milling machine to work with.

I have a 5axis NC Mill in my shop and it sure is nice for this type of work.
00tec
06-29-2016, 18:02
As a former machinist, I'd love to know what all's involved in completing an 80% lower. All I can imagine is screwing it up horribly without having a milling machine to work with.

This jig has depth gauges built in. Just follow those, set the router depth tightly, and you're golden. You follow the top plate of the jig with the non-cutting part of the end mill to get the right dimensions.
Roger Ronas
06-29-2016, 19:10
I went to see 00tec and I used his jig to do mine.
Flawless.

Roger
Great-Kazoo
06-29-2016, 19:24
Same. I have a jig somewhere.

I borrowed someone's
rondog
06-29-2016, 19:30
So, I'm curious - what does finishing the remaining 20% entail? And do these lowers not have s/n's? Is that the attraction? Or is it just the price?
Irving
06-29-2016, 19:42
So, I'm curious - what does finishing the remaining 20% entail? And do these lowers not have s/n's? Is that the attraction? Or is it just the price?

They don't have serial numbers, and that, and picking up a "project" is the attraction. It's definitely NOT the price. I paid $85 a pop for my 80% lowers. Took me 5+ hours over two sessions to complete one, and I still need to go back and finish it up. I don't want to scare people away, because I'm no machinist, and would do it again. It's just that I have an almost useable piece of bare aluminum for $85 plus hours of labor that still isn't complete, when I can pick up completed PSA lowers all day for $40.
00tec
06-29-2016, 20:00
So, I'm curious - what does finishing the remaining 20% entail? And do these lowers not have s/n's? Is that the attraction? Or is it just the price?
The 20% is the 2 FCG pin holes, safety hole, milling the FCG pocket, and milling the trigger slot.
Part of the appeal is not having to pay CBI for permission to have one, the other part is having a project.

I got billet lowers at ~$100 per, and I can machine one with the jig in 1-1.5hrs. Stripped lowers are cheaper generally when already complete, but once you tack on a transfer and CBI fee, the margins shrink.
00tec
06-29-2016, 20:14
Here's one I completed. Most were anodized, got this one for a future cerakote project.

http://i131.photobucket.com/albums/p302/mchl_wood/20160629_200027_zpsuhcemhal.jpg (http://s131.photobucket.com/user/mchl_wood/media/20160629_200027_zpsuhcemhal.jpg.html)

http://i131.photobucket.com/albums/p302/mchl_wood/20160629_200032_zpsknumbwjp.jpg (http://s131.photobucket.com/user/mchl_wood/media/20160629_200032_zpsknumbwjp.jpg.html)

http://i131.photobucket.com/albums/p302/mchl_wood/20160629_200037_zpstko2gpab.jpg (http://s131.photobucket.com/user/mchl_wood/media/20160629_200037_zpstko2gpab.jpg.html)
Combatmoose
06-30-2016, 10:17
I've done one as well. As long as you take your time, and follow the instructions carefully, it works out just fine.
Grant H.
07-01-2016, 14:20
I've done, and helped a bunch of people do them.

I have the 80percentarms jig that was linked, and it works very well. It's gotten to the point that when I crank one out for one of my builds, I spend about 1:15 on it and I have a lower ready to go. I have another one that is 95% drilling to finish, and then a quick finish pass with an end mill. It came with my 9mm 80% lowers so I figured I would give it a shot.

Considering that I am spending $39/lower, and have already paid off my jig and tooling, the price is pretty nice, but I am also a fan of no paperwork.

I thoroughly enjoy the 80% stuff because it's more of a project than just bolting stuff together. I've got 80% 2011's, 1911's, P228's, AR-15's, AR-9's, AR-10's, 10/22's, etc... My wife just shakes her head and chuckles when UPS and Fedex show up...
KevDen2005
07-04-2016, 10:18
Thanks guys. I will plan on borrowing one this winter...for a winter project. I have too many summer tasks going on.

Here's an odd question and probably not the section for it, but is it possible to add a serial number to one of these and transfer it in the future? Like I mentioned before I really just want to try and do this myself as a project but may not necessarily want to keep every lower...especially if my first couple aren't pretty. [Coffee]
Grant H.
07-04-2016, 10:52
Thanks guys. I will plan on borrowing one this winter...for a winter project. I have too many summer tasks going on.

Here's an odd question and probably not the section for it, but is it possible to add a serial number to one of these and transfer it in the future? Like I mentioned before I really just want to try and do this myself as a project but may not necessarily want to keep every lower...especially if my first couple aren't pretty. [Coffee]

Legally, you cannot complete an 80% gun with the intention of selling it. IE you can't manufacture for sale and profit.

However, if you make one, and at some point in the future decide to sell it, you can serialize it and sell the firearm.

It's a grey area, but it is technically legal.
KevDen2005
07-10-2016, 17:53
Legally, you cannot complete an 80% gun with the intention of selling it. IE you can't manufacture for sale and profit.

However, if you make one, and at some point in the future decide to sell it, you can serialize it and sell the firearm.

It's a grey area, but it is technically legal.

Thanks for the info. I prefer to say within the confines of the law, even if I think it's dumb.