80% Arms- Easy Jig

[David_J]

Got the cheaper one that uses just a drill press, since I already have a harbor freight drill press.

I did mine on a cheap Harbor Freight drill press too! In case you have not used the HF drill press to do one yet, here are a couple things I learned. The HF drill press is not that sturdy. Don't put too much down force on the drill as the drill table can flex. Check your chuck frequently when milling. Each time I checked mine I had to tighten it up again. It might mess up your finish if the end mill got loose and wobbled around before you could stop it. I can't think of much more than that. It was a fun project and I like telling people I literally built my AR myself. Non gun people who don't know about 80% lowers look at you like you are some extremist freak! Then when you tell them it doesn't have to be registered it really blows their mind. Haha.

[00tec]

Then when you tell them it does have to be registered it really blows their mind. Haha.

Huh?

[David_J]

Typo - * doesn't have to be registered.

[Irving]

Typo - * doesn't have to be registered.

It doesn't have to be registered anyway, but we know what you mean.

[Great-Kazoo]

I did mine on a cheap Harbor Freight drill press too! In case you have not used the HF drill press to do one yet, here are a couple things I learned. The HF drill press is not that sturdy. Don't put too much down force on the drill as the drill table can flex. Check your chuck frequently when milling. Each time I checked mine I had to tighten it up again. It might mess up your finish if the end mill got loose and wobbled around before you could stop it. I can't think of much more than that. It was a fun project and I like telling people I literally built my AR myself. Non gun people who don't know about 80% lowers look at you like you are some extremist freak! Then when you tell them it doesn't have to be registered it really blows their mind. Haha.

Side force on the bearings of the chuck from the end mill are one of the problems you're having. I know people use drill presses for these projects, myself, i'd use a mill. Even one of those table tops units. Yes not everyone has access to a mill and a drill press does work. I'd be real leary of doing more than 1-2 using a drill press, tops.

[balyon885]

Got my jig today, lower comes tomorrow.

[balyon885]

The Anderson lower fits in the 80% arms universal jig no problem. Got some drilling done, what a mess it makes.

Anyone know where to get end mills locally, need a 1/4 and a 3/8 that are at least 2.5 inches long.

[skullybones]

Triad Tooling will get you hooked up. Down this way Cutting Edge Tool Supply.

[00tec]

The Anderson lower fits in the 80% arms universal jig no problem. Got some drilling done, what a mess it makes.

Anyone know where to get end mills locally, need a 1/4 and a 3/8 that are at least 2.5 inches long.

I will trade you a 4" 1/4 end mill 1 1/2 cut if you order and ship the end mill from 80% arms to my house.

[balyon885]

I will trade you a 4" 1/4 end mill 1 1/2 cut if you order and ship the end mill from 80% arms to my house.

Huh?