EA starts with their P90-PS90 ACOG low mount and takes it to a whole new level. With this new universal Lo Mount you can take any of the DT CAOS FsN Red Dot mounting plates and install it on your P90-PS90. This opens up your chuioces of hundred of red dot sights, cross compatibility with your FsN opistol and the EA Universal lo Mount still can mount your compact ACOG.

You can order the mount or with the DT CAOS plate of your choice already installed.

Comprehensive Red Dot to Base Compatibility Listing

This by far the best researched and most comprehensive compatibility list I have come across. LINK: Footprints/Mounting Standards on Red Dot Sights

Details of the base mount, The EALM100 Lo-Mount was specifically designed to attach a Compact Trijicon Scope to an FN PP90/PS90 weapon system. Trijicon ACOGs are fitted on tactical rifles by many civilian and military personnel because of their rugged, reliable performance. Existing rail mounts place the ACOG sightline uncomfortably high. The EALM mount will allow you to mount your Compact ACOG in a more natural sight plane making it much easier and faster to acquire a target. If you have an ACOG on your other rifles, now you can keep that same familiar sight picture. The mount is manufactured from aircraft grade aluminum and black anodized to make it a durable, corrosion resistant addition to your weapon

NOTE: FNH Recently revised the casting mold for the P90/PS90 making the receiver thicker in many places. This change necessitates having to remove a small amount of materiel at the rear section of the base. The amount is not substantial enough to warrant re tooling the mount as it will cause issues with older P90/PS90's