Check the listing for details. Mossberg Tactical 22 Threaded Barrel End for Non-Threaded Muzzles - 1/2-28 TPI. Condition: New. Listed at 24.95 USD. Convert your non threaded barrel to a standard 1/2-28 thread for all your end of barrel accessories. If you want to get the full fun factor out of your Mossberg Tactical 22, you need to be able to mount any 1/2-28 threaded accessory. Such as a FLASH HIDER / COMPENSATOR or an UNRESTRICTED fake SUPPRESSOR, then you need this part. This thread adapter easily attaches to the factory finished plain muzzle. You can easily install any standard 1/2-28 muzzle brake, flash suppressor / compensator, Etc. The largest diameter is a little larger than the current A2 Birdcage and similar flash suppressors. This sale is for the adapter only. You will need to purchase the end of barrel accessory and crush washer separately. This adapter is made in the U.S. using the finest stainless steel available. It has a black oxide finish for years of trouble free service. This may fit other barrels, but is intended solely for the Mossberg Tactical 22 plain muzzle that measures 5/8 or .625 inch. This item is a lot less expensive than going to a machinist or gunsmith. Plus you can do it yourself in seconds, and it can be taken off just as quickly.*** Please measure your barrel with a micrometer or calipers to ensure the barrel measures .625 inch If it is larger or smaller than that, you will need a custom fit adapter that's in this store. Use quality metal calipers or micrometer to get the most accurate measurement possible ***If the item does not fit because you did not measure the barrel (or you mis-measured) you can send it back with a $20 bill, along with the actual measurement, your name, email and that it is an eBay purchase to the return address on the package.It is your responsibility to know and follow all Federal, State, and local laws, rules, regulations, restrictions and legislation about purchasing/owning/using this product.