I have seen several trgs on here that have flush cups rather than hk hook eyes in the stock? I have reached out to several people that posted the pics and the answer always was "they came that way." I can see an adapter working very easy for the front and there must be a replacement part for the rear eyes but I am unable to find them listed anywhere. Already have a flush cups sling so no need to buy another one unless the flush cup adapters for 2 trgs exceeds the cost of sling with hk hooks and with sako accessories this is very possible.