New Smith & Wesson M&P15 PSX AR-15 Gas Piston Upper Receiver 5.56x45mm NATO 16" Barrel 1 in 9"

I'm starting the process of liquidating my collection of guns, ammo, and accessories. First item to get listed is a brand new, never fired (there is a brass stain on the bolt face, so assuming it was factory fired) Smith & Wesson M&P15 PSX AR-15 complete gas piston upper. The Smith & Wesson SKU for this upper is: 812007. I bought this years ago, and paid close to $900 for it at the time, and it's been sitting on a shelf with a bunch of other "projects" ever since. Below are the specs for this upper:

This Smith & Wesson M&P15 PSX AR-15 Carbine Gas Piston Upper Assembly is chambered in 5.56x45mm NATO and comes ready to fire right out of the box after installation onto any standard AR-15 lower receiver. This upper assembly features a gas piston operating system, which prevents hot gas and debris from being directed back into the action upon firing. The result is a rifle that runs cooler, cleaner and more reliably than those utilizing a standard direct gas impingement system of operation. The bolt carrier's solid steel, 1-piece construction incorporates an integral piston strike face to maintain integrity over time, while the bolt assembly is spring loaded for proper lock-up and to help reduce bolt bounce and cam pin wear.

The complete upper assembly, includes a flattop receiver, and 16″ M4 profile chrome lined barrel. The M&P15 PSX also features an A2 birdcage compensator, complete bolt carrier group with chrome-lined carrier, staked, chrome lined gas key and charging handle. In addition, the PSX includes a 7" Troy Quad Rail, allowing the shooter to mount a vertical grip, lights, or any other popular accessory to the handguard.

I'm located near Driggs, Idaho. I could meet a buyer as far away as Rexburg, ID. I'm not interested in shipping stuff at this point, so it would need to be a face-to-face sale.

My asking price is $550 cash, and I'm firm on that price. Please text me if you're interested!

Thanks,
Chad