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If it advertises a scope base then I'm sure it's included. I've had 4 different 10/22 rifles and all came with their own base. This model is not threaded for amsuppressor.mit was my pleasure to assist you.

Aaron, yes to both ?'s Sir. Unboxing video of same Model 21189 here : https://www.youtube.com/watch?v=IF6JpthZoWE

yes a scope base is included and it is threaded for a muzzle device 1/2x28 thread pattern StockMagpul® Hunter Black Synthetic Front SightFiber Optic Hi-Viz Rear SightAdjustable Fiber Optic MaterialAlloy Steel Barrel FeatureThreaded Barrel Thread Pattern1/2"-28 Capacity10 Twist1:16" RH FinishSatin Blued Overall Length35" Barrel Length16.12" Weight5.3 lb. Grooves6 UPC7-36676-21189-0 https://ruger.com/products/1022Takedown/specSheets/21189.html