Heckler & Koch HK MR762 & HK417 Slim Line Stock The HK Slim Line stock is the newer, thinner variant of the older battery storage 417 stock. Compatible with only receiver extensions and buffer tubes found on the HK417, G28 and MR762 rifles. Rubberized buttpad for a more comfortable and non-slip surface in your shoulder pocket Improved cheek weld providing a more natural and comfortable cheek-to-stock
