For sale HKMR556 A1 CC Date code started as a 16 inch A1 upper I had a 14.5 chrome lined barrel and Pinned and Welded muzzle device installed up top is a Primary Arms 1-6 Nova in a Vortex cantilever mount the upper is sitting on a Silencerco ambidextrous lower it has a 2 stage Sig Sauer trigger currently running a standard carbine buffer and a Tubbs Flat wire spring it ejects perfectly at 3 o clock and only 120 rounds through the new barrel gas block piston oprod and bcg it's been cerakoted in Moss Green and has a set of B5 Systems furniture it will come as pictured price is $1500 until Saturday if unsold I will pull the ad so either FTF sale or I will accept Venmo or Cashapp and if shipped it will be shipped and insured to your FFL and if locally interested message me nine 1 eight two four 47 forty 23 and if just wanting the upper I'd take $1000 either ftf or I will ship it insured to your door