Yes, the RISE Armament Limited Edition Ranger Road Trigger can be used with an AR15 chambered in 300 Blackout and function as intended.
The RISE Armament Limited Edition Ranger Road Trigger is a Gen I.
The RISE Armament Limited-Edition RA-140 Super Sporting Trigger with Anti-Walk Pins could be used in an AR9 if it takes standard dimension AR triggers. However, I recommend using the RISE Armament Rave 9mm PCC Trigger with Anti-Walk Pins at the link below. This trigger is designed for use in PCC like an AR9.
https://www.opticsplanet.com/rise-armament-rave-pcc-trigger-with-anti-walk-pins.html
The RISE Armament Limited Edition Ranger Road Trigger is non adjustable and has a pull weight set at 3.5lbs.
Yes, this trigger will indeed work in your AR15 chambered in 300 AAC Blackout.
Yes, this is compatible with both AR platforms.
We do not currently offer a trigger for the AK Platforms.