Fits 11mm dovetail. Been sitting on a R1-AW for 20 years behind a Beeman SS-2L 3x. Sold the scope, and I don't anticipate installing another short scope. No trades, third party, or international sales. Will ship in a USPS small rate box for $8.10 CONUS. Buyer pays shipping charges. Paypal FF/Good and Services (+3.3%)/Venmo. Asking $45 + shipping.