Home / Services HK416 MR556 / HK 416A5 Extended Ambidextrous Bolt Catch Release Please choose product options by visiting HK 416 Gas Block For 10.5in Barrel Vented German. HK 416A5 Extended Ambidextrous Bolt Catch Release$8900 SKU: AMBIBCA5 Categories: 416 417 G28 M110, Services HK416 MR556 Tags: 416, 416A5, MR556 Product ID: 4356 HK 416A5 extended ambidextrous bolt catch/release leaver. These are perfect for the 416, 416A5, 416A7 and any other compatible platform. Requires machining for installation. Steel Black Requires Receiver Machining Factory HK Part Product is out of stock Notify me when this product is back. Please enter a valid email! Subscribe Description Additional information Description HK 416A5 extended ambidextrous bolt catch/release leaver. These are perfect for the 416, 416A5, 416A7 and any other compatible platform. Requires machining for installation. Steel Black Requires Receiver Machining Factory HK Part Additional information Weight 1.0 oz Dimensions 2 × 2 × 1 in Manufacturer HK Related products HK MR556 416 Adjustable Gas Block For 10.5in Barrel $44900 Out of stock HK 416 Gas Block For 16in Barrel Vented German $19900 Out of stock HK 416 Gas Block For 10.5in Barrel Vented German from: $29900 Out of stock Sale! HK 416 Factory Full Auto Complete Bolt Group New $1,69900 $1,49900