Centurion arms midlength 14.5 5.56 1/7 socom profile chrome lined barrel. Factory built upper.
https://centurionarms.com/uppers-lowers/cm4-complete-14-5in-enhanced-socom-crmov-midlength-with-fsb/
Upper is not pinned and welded but comes with Bcm extended a2 birdcage with pin. Toolcraft chrome bcg with ch. Carry handle and pri rear sight included. Located in Killeen. $550 text 254-389-4582