Product Description The Heckler & Koch MR556 A4 Slimline Buttstock is a factory-original HK component designed to deliver a sleek, lightweight, and durable upgrade for your rifle. Engineered for compatibility with the MR556 A1/A4 and HK416 platforms, as well as both commercial and mil-spec AR-15/M16 buffer tubes, this stock offers a low-profile design that enhances maneuverability without compromising stability. Constructed from high-strength black polymer with precision fitment, it is built to withstand demanding conditions. Its slim contour reduces bulk while maintaining a solid shoulder weld, and the stock is prominently marked with the iconic HK logo. As issued on specialized HK416 and MR556 rifles, this buttstock is the choice for professional and civilian shooters seeking a streamlined, ergonomic, and retractable stock solution. Product Highlights Factory HK Component: Genuine Heckler & Koch part as issued on specialized HK416 and MR556 rifles, ensuring authentic quality and fitment. Broad Compatibility: Fits all commercial and mil-spec AR-15/M16 buffer tubes, as well as MR556 A1/A4 and HK416 platforms. Slimline Low-Profile Design: Reduced bulk and slim contour improve rifle maneuverability and handling in tight spaces. High-Strength Polymer Construction: Durable black polymer build provides long-lasting performance under harsh operational conditions. Retractable Stock: Adjustable, retractable design allows for a customized length of pull to suit different shooters and shooting scenarios. Specs Brand: Heckler & Koch (HK) Model: MR556 A4 Slimline Buttstock Manufacturer Part Number (MPN): 50236720 UPC: 642230270299 Color: Black Material: High-Strength Polymer Type: Stock/Chassis, Retractable Compatibility: MR556 A1/A4, HK416, AR-15/M16 (Commercial & Mil-Spec buffer tubes) Weight: 1 lb Condition: New Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer. ]]>