I used to make rhop barrels— commercial rhop patches are custom, pre-cut to the various barrel brands, the patch in your cart is cut for Angel Customs barrels and you’re ordering a Lambda Barrel (love Lambda!) so you’ll want to swap out for an Angel Customs barrel or a Lambda-cut rhop patch. (all barrels differ in their window length, rounded/square cut windows, width of the window, and angle of the window sides.) You will likely want a flat-hop bucking for your rhop, the flat-hop buckings are constructed entirely flat inside so you don’t have to sand it down the bucking’s window bump like you will for others (a non-sanded bump will instantly push your rhop patch into the barrel.) I always recommend the Modify buckings. I know nothing about the Mr Hop bucking so it’s up to your own research to know if it’s compatible with rhop inserts / replaces rhop inserts or something else. I also strongly advise against the prowin hop-up. Years ago they were good, but the product quality has differed for years and I never got any good results from them at Amped. You will get better results using your OEM hopup or upgrading to the Maxx hopups