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Best place for carbide bits... update with sort of finished 80% project on pg 2

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shooter:
 should be roughly 1,000 rpm for aluminum

RobertH:
ok, here's the somewhat finished product...

milling the fire control area:


drilling the safety selector hole, trigger and hammer pins:


my tools:  Bosch Colt 1HP router and Bosch 3/8" corded drill


the excess 20%:


final product:


so, what did i learn?  if you notice the rear of the lower, you can see i drilled down too far.  that is because my drill stop decided to move up and i never noticed it.  i also learned the filings get everywhere!!  clothes, shoes, hands.  make sure you don't drag the stuff in the house!

i do have a few final touches yet.  the fire control area is a little tight.  i'll have to smooth up the sides because the hammer and trigger assemblies get stuck about half way down.  also the safety is really tight.  i'll have to smooth up the inside because the rear of the safety is rubbing on the selector.  i think the trigger and hammer pins are a little too loose for my liking.  i'll get non-rotating pins for that small problem.  but those problems are all minor things.  in all, i think i made a darn good lower for my daughter.  i have another lower that i will finish later.  one lower for each daughter, built by their dad.  maybe they will want to go shooting when the get older.  i will also get the lowers cerakoted and engraved with their names and custom serial number later as well.

bkoenig:
That looks pretty darn good.

RobertH:
well i had to remove quite a bit of aluminum around the safety and rear part of the trigger assembly.  i can only think that i didn't mill out enough when i was milling.  i couldn't see very good, so i must have been close, but not all the way back.  so i used my dremel and several grinding and smoothing bits.  the trigger and safety are still tight, but functional.  on safe, the trigger does not move at all.  my other lowers all have a little jiggle in them, so i might loosen it up a little bit, or i might leave it as is.

the takedown and pivot pins are VERY tight.  i kind of like that, but then again its a pain to get them opened and closed.  i might smooth out some parts on the lower so it will fit better.  hopefully it will be test fired someday soon.  the upper worked with a standard Anderson lower, so i hope my lower can get this upper to fire as well.

anyways, its coming together nicely:

bkoenig:

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