Heckler Koch HK SL6 / 630. His sucker is new old stock in original 80’s era as in received packaging. In over all outstanding new condition. I have had this mag in my gun safe wrapped in VCI corrosion inhibiting paper. Since the early 80s these mags impossible to find new. I promise you will not find Better. I post clear easy to view large pictures of all sides. No Bleacher seat shots. Its just not happening.. Nothing like a tight spring to keep you cycling rounds flawlessly. You will not find better than this out there on the market today. So take your shooting performance to the next level. Please check my other auctions for other hard to find HK stuff.