If the WWSD2020 (What Would Stoner Do) is the BRN-180, then it is NOT even close to the Sig Virtus in flexibility or capability.
The BRN-180 has these negatives compared to the Virtus:
- A reciprocating charging handle
- Unable to change barrels at customer level
- Unable to change Handguard at customer level
- Unable to change caliber at customer level
I have both and would NEVER consider a BRN-180 equal to or even close to a Virtus. If the OP wanted a light weight setup, the Virtus isn't it. But they are insanely popular right now, so he can sell it and get some pencil barreled ultra light weight configuration, that lacks the capabilities, features, and flexibility of the Sig Sauer Virtus.