Anybody finished their own 80% lower?

[grasshoppa]

Ive searched every possible way on here and nothing. Has any one on here ever used an 80% jig to finish an ar lower? Im really interested in buying the jig to do 5.56 but really really have an itch to build a AR in 9mm. 

[Ronald_55]

I am not at the point that I trust my machining skills for something that needs to contain an explosion that close to my body.

I know 80%s are billed by some as "invisible", but if I want an AR that is not registered to me, I can pick up any number of local person-person ones on sale. 

[Raoul]

It's not particularly difficult if you're semi-handy and careful. At least that's what I've been told.....

[Omega]

I looked at doing one just for S&G before the bottom fell out of the AR market, the one that uses a router looks like the easiest one but they can get pricey.  

[xtriggerman]

To do a decent job, you need to have a milling machine of some sort. I use a small bench top mill with a mod of a dial indicator on the depth quill. I suppose some one who is very carful might be able to hollow out the cavity with a drill press & drills with maybe a dremil to clean things up but in my book that's a night mare since grinding aluminum packs up a grind stone or diamond infused cutter pretty quick. After a diligent search for a jig a couple years ago, I bought this one   http://www.kearms.com/ke15-jig  Its a nice jig with hardened pin bushings. Iv only done one 80 so far but it worked well.  I always thought a 45ACP in a AR set up is nice since I have a number of grease gun mags but just as many other irons in the fire! Good luck with your decision.

[grasshoppa]

57 minutes ago, xtriggerman said:

To do a decent job, you need to have a milling machine of some sort. I use a small bench top mill with a mod of a dial indicator on the depth quill. I suppose some one who is very carful might be able to hollow out the cavity with a drill press & drills with maybe a dremil to clean things up but in my book that's a night mare since grinding aluminum packs up a grind stone or diamond infused cutter pretty quick. After a diligent search for a jig a couple years ago, I bought this one   http://www.kearms.com/ke15-jig  Its a nice jig with hardened pin bushings. Iv only done one 80 so far but it worked well.  I always thought a 45ACP in a AR set up is nice since I have a number of grease gun mags but just as many other irons in the fire! Good luck with your decision.

thanks for the replies guys. and x thanks for the link . seems like they have several 80% jigs on the market now i just need to go and bite the bullet . I agree a 45 ar would be awesome. but you guys are right by the time you buy the jig , tools and end mill i could have just bought a nice complete lower from someone.

[cybernorris]

I’m considering doing an 80% lower Glock 19. 

Tennessee Arms makes a polymer 80% lower AR that looks like it would be easier to build from than a metal lower. 

[DaveTN]

Yeah, if you have a mill or access to one an 80% lower is pretty easy. If you have to use a jig or a drill press you won’t save any money and will probably have suspect quality. Lowers are cheap.