Shop › MAG HK USP-FS 9MM 10RD MAG HK USP-FS 9MM 10RD $54.99 Heckler & Koch Magazine, 9MM, 10 Rounds, Fits USP, Black, Red Follower 50248611 Quantity: Add To Cart Added! Heckler & Koch Magazine, 9MM, 10 Rounds, Fits USP, Black, Red Follower 50248611