PS90 optic mount question

[doubleg]

Purchased a used ps90 and it came with this optic mount attached. Can anyone tell me what kind of mount it is and what optic it is designed for?

 

[saiga308]

maybe some kind of red dot setup

or flash light

 

[Dave DeLaurant]

The original sight was a non-magnifying prismatic sight made by the British firm Ring Sights, using a mount specifically designed for the P-90.

http://www.ringsights.com/Products/sights/SightsDesc/MC-10-80.htm

If you haunt eBay and Gunbroker and search on ringsights, used examples do show up from time to time.

It is a relatively simple and very rugged (solid glass) design, but because many end users preferred more versatility FN began offering Picatinny rail versions of the P-90 series from the factory.

Brownells carries the FN picrail adapter if you prefer that route:

https://www.brownells.com/rifle-par...-thread-usg-side-rail-aluminum-prod72446.aspx

I would contact FN USA for advice before laying out any money: https://fnamerica.com/customer-support/

 

[doubleg]

I emailed FN and they said this mount is compatible with the C-more systems sts2.

 

[doubleg]

Well I’ve experienced quite a letdown. I purchased a sts2 and it didn’t even come close to fitting the mount.

 

[Dave DeLaurant]

Well I’ve experienced quite a letdown. I purchased a sts2 and it didn’t even come close to fitting the mount.

Bummer! Perhaps you could try the Brownell's picrail after you've returned the STS2?