HK designed & manufactures in Germany 11″ HK416, MR556 extended quad rail. This drop in unit offers 2 full inches in extra length, compared to the regular 9" version.
 
11" length
quadrail
fits HK 416/ MR556/ MR223
Weight: 14.5 Ounces
made in Germany by HK
Screw included!
this item might have some storage/ shipping marks