I have a unique factory Colt 14.5" M4 barrel and Knight's Armament Free Float RAS forearm combination for sale.
The unique part is that the barrel is an extremely rare find having never been drilled for the front sight tower pins. The barrel is a standard weight 14.5" M4 configured barrel that has never had a FS tower on it. When assembled with the Knight's Armament low profile gas block, there will be no unsightly pin channels on the barrel. The barrel is properly marked "C MP 5.56 NATO 1/7" and has a "4" at the chamber end. Barrel condition is 100% new.
The Knight's Armament FF RAS forearm is another rare item. It is the two-too long carbine Free Float RAS, KAC part number 20211. Basically, it has an additional two rails in length making it too long for a standard carbine barrel, but perfect for this combination. It will give you a little more rail space and is made to fit over the Knight's low profile gas block. The FF RAS includes the complete forearm assembly with three 11-rib panels. FF RAS condition is new-in-box.
Also included, to complete the installation, is a Knight's Armament low profile gas block (.750" diameter). Condition is new.
Package price for barrel, FF RAS, and gas block is $550 shipped. I prefer Paypal, or will accept a USPS money order. This is a package only, I will not split up the items. No trades at this time.
If interested, I also have a Knight's Armament Front Folding Sight (rail mount) for use on this combo, KAC part number 99051. The sight is new-in-box. If purchased with the aforementioned items, the sight is an additional $100, for a total package price of $650 shipped.
All parts are sold. Thanks.