This is gonna be a long shot, but I'll try anyway. I'm wanting to acquire a 16 inch (at least) ACR in 223/556 in exchange for my Robinson Armament XCR-L. Serial number is in the 13000's, factory 2 stage trigger is fantastic, gun has had maybe 300 rounds through it total. I've always wanted an ACR and found this forum researching stuff for my XCR. The gun has a Magpul zhukov stock on it. I'll throw in a bipod (just a cheapie caldwell) too. Comes with a soft case. I paid 2k for the thing. Depending on the deal, I also have an 18.6 inch 224 Valkyrie barrel/bolt to throw in on trade as well. Hit me up, let's talk if you're interested.