HK 416 Vented 10.4" Gas Block with Ambi Sling Loops

HK416 Vented 10.4″ Gas Block W/ Sling Loops HK416 Vented 10.4″ Gas Block HK416 Vented 10.4″ Gas Block with Sling Loops Original German Part HK 416, MR556 Part Vented Gas Block for 10.4" Barrels Bayonet Lug Rated NRA Excellent to NOS With Ambi Sling Loops HK416 Vented 10.4″ Gas Block. Original German Vented Gas Block made by HK for the 10.4" barrels with ambidextrous sling loops. Rated NRA Excellent to NOS