Yes, too many Mark's for one line. The rail is the Mk16 rail in medium length for a carbine gas system to support the Mk18 weapons system, also known as the CQBR Block 2 URGI. Now that you have digested that, the Mk16 rail is a 10.5" length in DDC and is designed for an 11.5" or longer barrel. Ideally, the Mk18 CQBR has the 11.5" barrel, but this will also go nicely with a 12.5" barrel.
The Mk16 is the latest evolution in Geissele's Super Modular Rail. It is based upon the Mk14, but then adds upper tabs to lock-in the alignment between the upper receiver and the rail, and is US military issue. To fit the US military requirement, the upper rail is T-engraved, but no paint. The Geissele brand is roll marked on the rail, and the rail will come with either an NSN number or Geissele model number.
This is the same rail that is found on the new Mk18 Mod 3 or what the Army calls the Close Quarter Battle Receiver, Upper Receiver Group Improved, in Geissele anodized DDC.
The Mk16 is the latest entry to the Geissele line up of Super Modular Rails. The new handguard design offers a smaller diameter and overall height to create a slimmer package; even slimmer than the Mk14. Included is an updated version of the proven Geissele Barrel Nut design, not only providing ease of installation but superior rigidity. The Mk16 rail is 3d precision machined using mil spec Aluminum due to its strong, rigid and lightweight properties.
The Mk16 rail utilizes Magpul’s M-LOK technology in a full octagonal configuration, allowing the end user full customization and modularity of their rifle Mk16 Super Modular rail is finished in a durable and long-lasting Type 3 Hardcoat Anodized DDC aluminum.
NSN marked or Geissele part number marked on the left side. We get both.
Ships with Factory Box:
Note: package contains rail, barrel nut and allen wrench for the smaller tab screws. Includes all screws and back-end tab. Does not include larger Allen wrench for the barrel nut screws. Does not contain gas block. Does not contain barrel nut wrench.
Manufacturer's Product No. 05-650S
ITAR warning: This item may only be purchased and shipped to US Persons within the USA. This is a military item, which is restricted from export without US