Home / Services HK416 MR556 / HK 416A5 Extended Ambidextrous Bolt Catch Release You cannot add "HK 416A5 Extended Castle Nut" to the cart because the product is out of stock. 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 Out of stock HK 416A5 Style Quad Rail Foregrip Handguard Tan/RAL8000 $27900 Out of stock Sale! HK 416A5/MR223 Factory Tan/RAL8000 Stripped Upper Receiver From: $99900 $89900 Out of stock Tan Rail Mounted Sling Loop HK G28 M110 RAL8000 $5900 Out of stock Clone/Reproduction HK M110A1 SDMR Scope And Mount $49900