MR556A1 upper, with A3 bolt catch protector shelf? Best to source one of the HK A5 uppers and have the rear pic rail area machined to look like the A1 style.
Looks like an 9.5/10” Handguard that covers the waffernberk? adjustable gas block. Unique bayonet lug to the F model. And unique flash hider as well.
Lower is 416/A5
front sight is standard HK flip upand rear is unique HK rear to F model. 416A5 castle nut and A5 end plate.
A forum dedicated to and laser-focused on Heckler & Koch firearms, Heckler & Koch accessories and the owners and enthusiasts that love them! Come join the discussion regarding HK pistols, long arms, NFA arms, HK accessories, HK history and trivia and more.