Scalarworks SYNC/03 - Trijicon RMR mounts for Mossberg Shotguns - hero


Cutting Edge Trijicon RMR mount for Mossberg shotguns.

Enhance the effectiveness of your shotgun with the speed and precision of a red dot sight, while maintaining it's factory shooting ergonomics.

Perfect Placement

Puts your Trijicon RMR in the ideal shooting position.

Scalarworks Sync/03 Trijicon RMR mount for Mossberg Shotguns - co-witness
Scalarworks SYNC Trijicon RMR Mount (Mossberg 590A1)


The Sync's proprietary internal Key-Slot mounting system spreads side impacts across 4 anchor points.

Patent Pending.

7075-T6 vs 6061-T6

Every Sync is CNC milled from 7075-T6 billet, which has vastly superior mechanical properties to 6061-T6, and is used where ultimate strength and durability outweigh cost considerations.

Scalarworks SYNC/03 - Trijicon RMR mount for Mossberg Shotguns - lightweight


Meticulously machined to be the lightest optic mounting solution for Mossberg shotguns, without compromising an ounce of strength.

Scalarworks® Sync SW1300 (0.64oz)
Mossberg® 590A1 rail + Trijicon® RM33 Low Mount (2.71oz)

All Trademarks are the property of their respective owners and used in accordance with FTC Comparative Advertising guidelines. All parts weighed under the same conditions including rail screws.


Scalarworks SYNC/03 - Trijicon RMR mount for Mossberg Shotguns - water tight

The SYNC/03 features a water-tight mounting platform that doesn't require a sealing plate.


Worry-free, properly torqued and threadlocked, optic bundles.


(14 customer reviews)


Scalarworks Shop Perks
Choose a Configuration Above.
Choose a Configuration Above.
Choose a Configuration Above.

14 reviews for SYNC/03

Based on 14 reviews
5 star
4 star
3 star
2 star
1 star
Showing 14 of 14 reviews (5 star). See all 14 reviews
Add a review

Your email address will not be published.

  1. Jeremiah (verified owner)

    Verified reviewVerified review - view originalExternal link

    Great as described wish there was more optic compatability

    (0) (0)
  2. Stephen Cord (verified owner)

    Verified reviewVerified review - view originalExternal link

    Excellent product and I can’t say enough good things about the instructions and packing to make very clear sense as to mounting and torque specs. I will be ordering more for all my Mossbergs and highly recommend this mount.

    (0) (0)
  3. Anonymous (verified owner)

    Verified reviewVerified review - view originalExternal link

    On my slug gun does it’s job well

    (0) (0)
  4. Matthew Sharp (verified owner)

    Verified reviewVerified review - view originalExternal link

    Mounts to a 940jm pro no problem. Fit and finish are excellent and rock solid. Mounted a holosun 508t for a ghost ring effect. Awesome set up.

    (0) (0)
  5. David Bailey (verified owner)

    The Sync is perhaps the best investment you could get for a modern shotgun. I mounted this on a Mossberg 590 and paired it with a Holosun 508T. I chose the Scalarworks Sync because a lot of other red dot mounting options require the use of a picatinny rail, which invariably raises the red dot sight and forces you to raise your cheek off the stock. Anybody who has fired 12 GA slugs knows this is not ideal, and the Sync worked perfectly to keep the red dot low on the bore axis.
    I fired 50 slugs through my Mossberg 590, and I can say this is a sturdy mount. Once I got it sighted in, there was no point of impact shift during the entire time the gun was fired. This is such a well engineered product, and is worth the asking price.
    One more thing, pay attention to the instructions, as the center “B” screws do not need to be tightened all the way. You only need to get them tightened enough for the mount to slide on over top of them.

    (3) (0)