In this video,
I talked about the price, weight, gas, spring and ergonomic. And the minor problems I found.
Break arms Warhammer is the lightest one.
Aero precision Breach (ODG) is the most comfortable one.
Daniel defense has the best design overall. But Daniel defense is the most expensive one.
Aero precision breach is my second choice.
I don’t recommend to use Radian with AR9 bolt because the bolt could hit the ramp” inside.