WHAT DOES SAGE TS870R MEAN?

Just received my MCK for any G19 created from the poly80 kit with a custom made Rock fluted slide and threaded barrel. When ordering I used to be worried whether the more 50 % inch in the threaded barrel would fit in the event the barrel shroud was prolonged to G17 duration.If a pistol isn’t regarded heavy more than enough to need a brace, it may