Contacted LaRue (email) on March 11, 2021 inquired about "available" triggers. Their sales suggested "MBT 2S"
Went online and placed order (the web site says
nothing about triggers being back ordered. This was/is deceiving
Placed order for trigger March 12, 2021. Like OP, got immediate email trigger was on back order
but email gave no indication of delivery time.
Sent email inquiry on March 26 asking for expected delivery. Received response stating "minimum of 8-10 weeks from order to ship for the triggers"
IMPO:
They should update their web site to honestly reflect these delays.
If I'm lucky it will get to me end of May, 2021. Fingers crossed and hoping because it's the last part I need for my build.