Mesa Tactical LEO Gen II Telescoping Stock Adapter Mossberg 500

Description

The Mesa Tactical LEO Gen II adapter opens up a whole new level of customization for Mossberg 500 and 590 pump shotguns. Instead of being locked into the factory stock setup, you can now use the same AR-15 pattern stocks and pistol grips you might already have or prefer. The adapter simply replaces your existing stock, mimics the rear of an AR-15 lower receiver, and lets you thread in any standard AR-15 receiver extension and buttstock combination.

What Makes This Gen II Different

Mesa Tactical redesigned this adapter from the ground up for the Gen II version. It's noticeably more compact than older models, with a grip that angles forward a few degrees to match an M1911 angle instead of a straight vertical. This gives your thumb more room and makes it much more comfortable to hold for extended periods. The end plate engagement sits low on the sides rather than the top, so you won't catch it during recoil. The stock elevation is engineered specifically to let you use factory bead sights or iron sights without additional aiming aids, which solves a real problem other adapters have.

Built to Last

This thing is investment cast aircraft aluminum, CNC machined, and finished with a powder coat that resists corrosion and chemicals. It's the kind of construction you'd expect from something designed for professional use. Installation requires no gunsmithing and takes maybe 15-20 minutes with basic tools. Everything you need hardware-wise comes in the box, including hex keys and all mounting screws. Multiple sling attachment points are built in so you can rig it however you want.

What You Need to Know

The adapter itself is just the foundation. You'll need to source an AR-15 receiver extension (buffer tube), a buttstock, and a pistol grip separately unless you grab one of the complete kit versions. Most standard AR-15 grips work fine, though grips with thumb cushions might need minor modification to fit the grip angle properly. Users consistently report that quality matters here and that Mesa Tactical's reputation for durability is well earned. Every unit comes with Mesa Tactical's lifetime warranty backing the materials and workmanship.