Agree that JP makes good stuff,
But a bare 4,000 rifle is ridicules when you can buy a store bought very reliable and competitive
PCC for $2,500. I think the $2,500 price is also ridicules.
As simple as they are I realize that many do not have the knowledge to build one.
But if you can build one the knowledge how to do it is pretty standard and available.
A very basic "10 barrel or 5" shrouded one, Orange 308 buffer spring, Blitz buffer,
A good cheek weld stock, Hyper Fire or CMC trigger, handguard and pistol grip of choice.
Any 9mm upper and lower, Red dot of choice, good Glock mags, factory or good reloads to give
about 125 to 135 Power factor. $1,500 to $1,800 if you invest in a quality red dot.
Now you have a very reliable PCC that if you do your part will double tap A's all day long.
Spend the extra money on primers if you can find them.
Just my opinion.