The Galco Jackass Shoulder Rigs will not fit a Sig P320 Carry. However, the Galco Miami Classic 11 Shoulder System might work with that gun.
https://www.opticsplanet.com/galco-miami-classic-ii-shoulder-system.html?_iv_gun-model=sig-sauer-p320-1,sig-sauer-p320-compact,sig-sauer-p320-subcompact
The Galco Jackass Shoulder Rigs for the Beretta 92F/FS might work for a M9A3. However, I recommend contacting Galco to confirm compatibility. The shoulder at the link below should work for a M9A3.
https://www.opticsplanet.com/elite-survival-systems-ambi-shoulder-holster.html?_iv_parent-gun-model=beretta-92a1&_iv_code=7J-HT8-DJKSOLS-MASH7&_iv_gun-model=beretta-76,beretta-92,beretta-92-billennium,beretta-92-brigadier,beretta-92-centurion,beretta-92-combat,beretta-92-compact,beretta-92-vertec,beretta-92a1,beretta-92c,beretta-92d,beretta-92d-brigadier,beretta-92dc,beretta-92d-centurion,beretta-92dm,beretta-92ds,beretta-92f,beretta-92f-5in,beretta-92fc,beretta-92f-compact,beretta-92f-dao,beretta-92fs,beretta-92fs-brigadier,beretta-92fs-centurion,beretta-92fs-vertec,beretta-92f-w-oc-spray,beretta-92g,beretta-92g-sd,beretta-92g-elite,beretta-92l,beretta-92m,beretta-92s,beretta-92s-1,beretta-92sb,beretta-92sbc,beretta-92sbf,beretta-92sf,beretta-96,beretta-b92,beretta-bu9-nano,beretta-m92,smith-and-wesson-4500-series,smith-and-wesson-model-39,smith-and-wesson-model-59,smith-and-wesson-model-915,smith-and-wesson-model-3900,smith-and-wesson-model-4000,smith-and-wesson-model-5900,springfield-armory-xd-s
The Galco Jackas Shoulder Rig for the FN 509 will fit the FN 509 Compat Tactical and FN 509. The manufacturer does not state if the standard 509 Tactical would be compatible. I would recommend reaching out to them directly for more information.
The Galco Jackas Shoulder Rigs are not compatible with the Glock 22. I would recommend the DeSantis New York Undercover Rig Shoulder Leather Holster, found by using the link below:
https://www.opticsplanet.com/desantis-new-york-undercover-shoulder-holsters.html?_iv_gun-model=glock-22
Yes, the correct model Galco Shoulder Rigs for your Glock 20 are MPN:JR228B (Right Hand) and MPN:JR229B (Left Hand).
The correct Galco Jackass Shoulder Rigs for a full size 1911 are MPN:JR212B (Right Hand) and MPN:JR213B (Left Hand).
The Galco Jackass Shoulder Rigs will not fit a Browning Hi-Power. However, we do carry the Cebeci Arms Browning Leather Horizontal Shoulder Holster, which is designed specifically for the Hi-Power, and can be found by using the link below:
https://www.opticsplanet.com/cebeci-arms-browning-hi-power-tan-unisex-leather-horizontal-shoulder-holster.html
The Galco Jackass Shoulder Rigs will not fit a Smith and Wesson Shield. However, the Galco Miami Classic II Shoulder Harness System Holsters you can find by clicking the link below will fit a Smith and Wesson Shield.
https://www.opticsplanet.com/galco-miami-classic-ii-shoulder-system.html?_iv_parent-gun-model=smith-and-wesson-m-and-p-shield&_iv_gun-model=smith-and-wesson-m-and-p-9-shield,smith-and-wesson-m-and-p-9-shield-m2-dot-0,smith-and-wesson-m-and-p-40-shield,smith-and-wesson-m-and-p-40-shield-m2-dot-0
Unfortunately, no this will not work for it.
The features of this holster are accepts tie downs/cuff case/flashlight accessory attachments for the firearms.