Title says it all. I have a 10 MK1 thats in awesome shape. I also have a 10 416 rail that Im looking to sell or trade. Im looking for a 13 Geissele MK1 black or preferably ddc, sand, darker anodizing. Pictures upon request. Sale prices are $375 for the HK or $400 for the MK1 shipped via PayPal gift or you cover the fee. I can also do Venmo. Email is best for contact. Thanks!