This 1791 Gunleather PDH-2 Holster is not compatible with a Rossi 44 Special.
This 1791 Gunleather PDH-2 is only available in Tan. I would instead, recommend, the 1791 Gunleather BH2.4S holster (available in Black), and can be found by using the link below:
https://www.opticsplanet.com/1791-gunleather-orpdh24ssblr-bh2-4s-optic-ready-black-leather-owb-hk-vp9-sk-fn-5.html
Yes. This 1791 Gunleather paddle holster will fit your FN 509 as it is designed to fit Full Size and Compact firearms in the 3.5″ to 4″ inch barrel size range.
No. This 1791 Gunleather paddle holster is designed to fit compact handguns with barrels that range from 3.5" - 4". Your Sar 9 has a 4.4" barrel and would require the 2.4 model found using the link below:
https://www.opticsplanet.com/1791-gunleather-orpdh24cbrr-pdh-2-classic-brown-leather-owb-sig-p320-sprgfld-xd.html
This 1791 Gunleather holster is too big for the Hellcast OSP. You would need the subcompact version of this holster (Paddle Holster C), which you can find using the link below:
https://www.opticsplanet.com/1791-gunleather-1791-pdhc-paddle-holster-mult-fit-or-rh-sig-p365-sim-black.html
Yes. The Springfield XDM compact OSP has a barrel length of 3.8" and this 1791 Gunleather holster will fit compact handguns with a barrel length of 3.5" to 4".
Yes. This 1791 Gunleather paddle holster is designed to fit handguns with a barrel length between 3.5" to 4" in length. The M18 has a barrel length of 3.9" and will fit this holster.
No it will not.
No it will not.