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LEO® Gen II Telescoping Stock Adapter For Moss 500/590A1/Mav88 (12-GA And 20-GA)

$112.95 - $426.95
4 reviews Write a Review

LEO® Gen II Telescoping Stock Adapter For Moss 500/590A1/Mav88 (12-GA And 20-GA)

Use Mesa Tactical’s collapsible stock kits and adapters to install AR-15 adjustable buttstocks and pistol grips onto the venerable Mossberg 500 shotgun platforms for the ultimate in tactical shotgun configuration performance. The LEO adapter is our most basic, best-selling model, and features an optimal stock elevation allowing the use of iron sights or even the bead sight. 

The concept behind the telescoping stock system is simple: the shotgun stock is replaced by an adapter, which attaches to the rear end of the shotgun’s receiver and it, in turn, mimics the rear end of an AR-15 lower receiver, into which an AR-15 receiver extension tube can be threaded. The AR-15 telescoping stock and pistol grip can then be reliably attached.  

The LEO adapter is available in three types of kits, adapter kits, recoil starter packs or complete stock kits. Mesa Tactical’s upgraded versions include KynSHOT's hydraulic recoil buffers which replace the standard receiver extension tube normally used with AR-15 style telescoping stock assemblies. The recoil buffer is manufactured for Mesa Tactical by Kyntec. The KynSHOT hydraulic buffers (Mil-spec) are a recoil reducer designed for professional operators who require optimum accuracy and control. The KynSHOT® hydraulic recoil buffers reduce felt recoil from 70% up to 90%.

LEO® Telescoping Stock Adapters and Conversion Kits

  • Adapts AR-15 style buttstocks and pistol grips for use with Remington 870, Mossberg 500/590 and Beretta 1301 shotguns.
  • Stock adapters are investment cast aircraft grade aluminum, CNC machined and powdercoated black with a tough, chemical resistant finish.
  • Adjustable length-of-pull (LoP) to fit shooter’s stature or for use with body armor and other equipment.
  • Optional KynSHOT®  hydraulic recoil buffer (standard damping) reduces felt recoil by 70%; KynSHOT® hydraulic recoil buffer (selectable damping) reduces felt recoil by up to 90%.
  • Gives the shotgun similar handling characteristics to the AR-15.
  • Collapsible stock makes shotgun easier to stow, transport and deploy.
  • Pistol grip configuration allows increased control and user comfort.
  • Sling attachment points included.
  • Optional SureShell® aluminum carriers can be added to the M4 carbine buttstock.
  • Complete stock kits include stock adapter, M4 Carbine buttstock, Mesatac® Trego pistol grip and push-button sling swivel.
  • No gunsmithing required.
  • Please note if your ordering SKU 96230 it does not include a locking nut #92810 or a Push Button Sling Swivel #91190. these items are available to be purchased individually on our website.


WARRANTY All Mesa Tactical products are made in the USA of high quality materials and include LIFETIME WARRANTY.Mesa Tactical warrants that all products are free from defective material and workmanship and, subject to the conditions set forth below, agrees to repair or replace any part of a product that proves defective by reason of improper workmanship or materials without charge for parts and labor. In no event will Mesa Tactical be liable for damages, lost revenue, lost wages, lost savings or any other incidental or consequential damages arising from purchase, use or inability to use this product. No express or implied warranty is madefor Mesa Tactical product damaged by accidents, misuse, natural or personal disaster, or any unauthorized disassembly, repair or modification. Mesa Tactical’s warranty covers only repair or replacement of defective Mesa Tactical products.

4 Reviews

  • 5
    590 A1 Adapter

    Posted by Jim O'Glishen on 25th Jan 2024

    You get what you pay for. The adapter is very high quality and fit perfectly. All the parts needed were included with the adapter. Everything fit perfectly. This Adapter from Mesa Tactical completely transformed the 590A1.

  • 5
    Mossberg adapter

    Posted by NEO on 15th Nov 2023

    Fucking well made! Would buy again!!

  • 5
    Awesome Product!

    Posted by Unknown on 31st Oct 2023

    Well, it arrived quickly and in good shape! The Quality of this part is perfect! Fit & Finish us perfect! Thank you Mesatac!

  • 5
    This made my Mossberg 500 a perfect tactical shotgun. Perfect fit, amazing.

    Posted by Rick Swan on 24th Mar 2023

    Shipping and fitment was spot on.