Sugar Weasel by Q in 300 blackout. Absolutely love this "pistol". Totally reliable and gets nods and thumbs up at every range trip. I'm selling because I have the 300 Honey Badger and a 556 Sugar Weasel replaced this.
Gas is currently tuned for a suppressor. I'm happy to show you where and how to tune it, which is really easy through a port in the handguard.
I'd consider partial trade for a Trijicon ACOG + RMR mount. Meet around Frisco area.