There are 2 different models to choose from on the product page, the AR-15 and AR-10.
Since the CMMG Banshee MK47 is a unique rifle platform that is closer to AR10 dimensions the Midwest Industries Upper Receiver Rod AR10 model may work. However, I recommend contacting Midwest Industries to confirm compatibility.
We have not tested one on the LAR-8. I doubt it will as the LAR-8 is an armalight pattern rifle not a dpms.
These are meant for the AR-15/10 rifles.
Yes, it will work with the AR rifle.
MI-URR will
The Midwest Industries Upper Receiver Rod will not work with an MK17 Banshee in 9mm. There is currently not a model available for a 9mm receiver.
The Midwest Industries Upper Receiver Rod AR15 model will work with a 300 BLK AR.
Yes, the AR15 Midwest Industries Upper Receiver Rod (MPN:MI-URR) is compatible with an AR15 chambered in 300 Blackout.
The Midwest Industries Upper Receiver Rod AR10 model will work with DPMS LR308 and AR10 308 rifles. So it should work fine with an M&P10 .308.