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  1. I bought the “universal” router jig from 5D Tactical, will allow AR15, AR10, AR9 lowers to be milled. Its a fantastic tool, highly recommend. Now stocking up on 80% lowers.

  2. I bought a table top mill from Grizzly last year and have completed several 80% lowers. Really the only part with close tolerances is the drilling of the holes for the selector ,hammer pin, and trigger pin. A good jig is necessary for this or machinist training and the ability to read blue prints. As far as milling the pocket out one can simply look at a blank completed lower and measure a little and do it. A jig makes it much easier though. My son is a machinist and just to see if he could do it on my little machine he did one completely from blue prints and it turned out fine.

    There is a learning curve and expect to ruin 1 or 2 before you get it down. Patience is the KEY word here. My first disaster was milling through the floor because I was taking too much at a pass. If you want to make a nice pretty one you need to get the bare aluminiun mill it and then coat it. I have been unable to finish a coated one without scratching it some.

    I have found this place the best for bulk 80% lower purchases. On the reciept it only says machine parts. I am sure there are other good places too.



  3. Remember the old rule of negotiation. Always ask for more than you want. This is what the demos are doing with there anti-gun (read civilian disarmament) plans.
    I wonder if writing to our congress-critters is even worth the trouble anymore. (I still do it anyway.)
    Looks like all we can do is prepare, prepare, prepare.

  4. polymer80.com lowers are very effective. Their throw-away one-use jigs are outstanding in performance, IF you follow the instructions and use a hand-held drill (not drill press) in the appropriate spots. No worries about having to coat the finished receiver.

      1. Reduced weight, and self-lubricity, are a couple benefits of polymer. Also, it is thicker than aluminum in critical places. The G150 is beefed up, and it looks like the new RL556 lower may be even tougher. It may help to use reamers to clean up the pin and detent holes, if you have access. Otherwise, maybe a wire-gauge-size drill bit on the detent holes, and the recommended chainsaw file on the pin holes.

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