Hi Keith, If your McCoy 28 gauge locking block is broken, consider the following options for replacement:
E-commerce Platforms: Websites like eBay often have parts available, including locking blocks for various shotgun models.
Gun Shops: Local gun shops may carry replacement parts or can order them for you.
Stay safe & have a great day!

I agree with James. Try here: facebook.com/groups/2235610390056029/posts/4306152959668418/ ------------------------------ and I would also search EBAY: -- ebay.com/sch/i.html?_nkw=McCoy+SAS+28+gauge+locking+block&_sacat=0&_from=R40&_trksid=m570.l1313

Hi Keith and welcome. I would look into contacting some owners here. Some were willing to part out their SAS due to other issues. facebook.com/groups/2235610390056029/posts/4306152959668418/ ------------------------------ and I would also search EBAY: -- ebay.com/sch/i.html?_nkw=McCoy+SAS+28+gauge+locking+block&_sacat=0&_from=R40&_trksid=m570.l1313 ------------- Cheers and stay safe!