Website To Get Ar Lower Jig Plans?

[lowlife]

I am looking for a dimensional drawing for an AR-15 lower holding jig and an AR-10 lower jig. Google was not kind to me. Thanks

 

[sgisler]

Try looking this up. I have a copy I pulled down from his site but not sure how to put it here.

Machining the AR15
Lower Receiver Forging
by
Ray Brandes

Looks pretty complete. I haven't started any of mine yet.


Stan,
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[ScrapMetal]

I made a set of vise jaws using the Ray Brandes document and his dimensions (as well as having a crappy "commercial" jig to look at). There are pics of the jaws in post #8 - http://hobby-machinist.com/threads/ar-80-lower-finishing-order-of-operations.27690/

They are functional and got the job done but in retrospect and if I make another set I'll probably start with an 8" wide jaw so I can include a pivot pin and take-down pin in the jig/jaws themselves.

Here's the site I got the Ray Brandes plans from - http://www.lecreg.com/P4x4/ARblank.pdf
-Ron

 

[sgisler]

That's good to know. I'll file that tidbit away for when I (finally) start mine.


Stan,
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[ScrapMetal]

Hope it helps Stan.

Now for the OP - Another flash of brilliance (those don't come too often anymore ) in that if a person has a mill with a dro there is absolutely no reason to have an actual jig to show you were to drill/route. All that one needs to do is firmly hold the lower in a vise or fixture. You'll be taking most, if not all, keying off of the front pivot pin to get your front to back measurements and the exterior sides of the lower to find the center line.

I started out by working with a borrowed commercial made jig that was a drilling and routing guide and it really created more problems than it helped. It got in the way of being able to see where your actual cuts were, made it difficult to get measurements on the depths of cuts, and couldn't be depended upon to remain square or hold the lower properly. I know the jig I had in hand was not one of the better ones on the market (I like the looks of the ones that Tactical Machining offers if you still really want one.) but if your not trying to do this on a drill press you best use a better, more solid, design.

JMHO

-Ron

 

[wrmiller]

I don't want to hijack the OP's thread here, but I have a mill and dro and would appreciate some suggestions for holding the lower for machining. Thanks.

 

[sgisler]

wrmiller19, take a look at the link in scrapmetal's second post above. The Ray-Vin write up includes pix of all his setups - pretty informative. (My apologies if you have already )


Stan,
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[wrmiller]

wrmiller19, take a look at the link in scrapmetal's second post above. The Ray-Vin write up includes pix of all his setups - pretty informative. (My apologies if you have already )


Stan,
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Thanks! I got stuck going through the PDF that he posted about machining a blank and realized that I may have asked that question to quickly.

I will check out the second link. Thanks again.

 

[lowlife]

I printed the Ray Vin papers for a hardcopy. Maybe I glossed right by it. I think maybe I should have titled the thread. "How do you guys hold your AR lowers" Appreciate all the responses.