>every lower 80 blueprint online is different by up to .100 thou >on some prints the fire pocket width is plus minus .002 thou, some its plus minus .010, some say its .680 some say its .700 >every dimension is like this >unending frustration because of this, and retards that aren't machinist trying to make a fucking print with rulers and shit >get a finished bear creek lower, put it in a vice and indicate it in to 0 >edge find every single dimension, use radial gauges on the inside corners, depth mics on the pockets >do this twice to repeat the numbers and guarantee accuracy >all instruments I used are accurate within .001 >print I have come up with is completely fucking different than any print ive seen online by nearly .250 thou in some dimensions >this lower is straight from the factory, not modified, been fired and is in working conidition
what the fuck is this shit? why is this so goddamn hard? just give me the goddamn dimensions so I can make the part. is this part of the lower so wide open that all of these wide range of dimensions are considered in tolerance? this is the blueprint I came up with using modern CNC measurement equipment so I know for a fact its going to work but i just want an answer on why the FUCK every print out there is different?
Because it really doesn't matter a couple thou on the pocket dimensions. Hell, I hacked out an 80% lower with a fucking dremel lmfao as long as the pin holes are within a couple .010thou and the safety is pretty spot on, you're good to go. The hammer can be off a full .1" and still fire fine you know?
Really it's not that important. That's why things like picrelated can exist
The dimensions of the lower aren't all that important in an AR as long as they aren't dramatically wrong.
The upper is where the tolerances really matter.
Cooper Butler
>bear creek what are you even doing
Austin Brown
The majority of the measurements are totally meaningless. As long as these are correct relative to each other the rest requires very little precision: -takedown and pivot pin location -trigger pin location -threads for receiver extension
Like the other user said, the things that matter are in the upper, and even then the critical part (headspace) has nothing to do with the upper itself.
John Myers
How can you pretend to know anything about machining and metrology, and be that oblivious to critical vs. non-critical dimensions?
Snowflakes and it's not even winter.
Logan Miller
People here are shitting on you like they always do, but I appreciate the work you've done, OP.
David Ortiz
Post toolbox faggot. I know more than you. If you're an anal autistic retard about dimensions you'll never fuck up. Kill yourself
Jaxson Davis
This user knows what's up?
Luis Smith
Just use the step by step from a forge pdf or get an 80% rig Both should be easily accessible
