Product Preview: Detachable Magazine Kit For the Mossberg 500

posted on June 3, 2016
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
magkit.jpg

There is no doubt that pump-action shotguns are a viable self-defense option due to the manual, simplistic and almost fail-safe operation they employ. However, some shooters wind up shying away from the scattergun because of the difficulty in reloading it quickly—something that is even more frustrating during high-stress situations. Adaptive Tactical, LLC, has devised a solution in the form of a detachable-box magazine kit for the Mossberg Model 500, 590 and Maverick 88 shotguns.

In conjunction with Mossberg engineers, Adaptive designed a replacement magazine tube/well that offers a hook-and-rock style engagement that not only works well, it cleanly blends with Mossberg’s factory action. The Sidewinder Venom-SE 10-round box kit reviewed here contains all parts necessary for conversion along with the company’s Ex Performance stock and pistol grip, Wraptor fore-end and detachable 10-round Sidewinder Venom magazine.

Installation is very straightforward, although a bit of custom work is required. Removing the factory magazine tube was a bit of a chore, and some hand-fitting was required to install the replacement. Indexing the magazine tube perfectly required a bit of material removal via the supplied emery cloth.

The furniture provided within the kit completely changed the gun’s performance and handling. Despite the change of balance and downward-protruding 10-round magazine, range testing proved the system to be a viable option. Only one magazine ships with the kit, but additional magazines are available on the company’s website starting for around $50. Price: $300 (black), $340 (camouflage). Contact: Adaptive Tactical, LLC.; (208) 442-8000; adaptivetactical.com.

Latest

Icarry Taurus TX9 Compact 1
Icarry Taurus TX9 Compact 1

I Carry: Taurus TX9 Compact in a Galco Holster

In our latest "I Carry" segment, we pair the new Taurus TX9 Compact with a leather Stow-N-Go holster from Galco, Inc. This compact, concealed-carry kit is rounded out with an Xolotl automatic knife produced by CRKT.

The Armed Citizen® March 13, 2026

Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.

Review: Canik USA MC9 Prime

Canik USA built out its concealed-carry handgun lineup with the MC9 Prime, which is a larger, yet still slim, CCW gun that sits in the same category as other upsized micro-compacts.

U.S. Army Awards Mossberg Contract for Additional 590A1 Pump-Action Shotguns

The U.S. Army has awarded O.F. Mossberg & Sons a contract for approximately $11.6 million dollars to supply the U.S. Army with additional Mossberg 590A1 pump-action shotguns.

250 Years of the U.S. Army: Bolt-Actions & Semi-Automatics on the Battlefield

In just a few decades, the U.S. Army would see itself go from a single-shot, blackpowder design in the form of the Trapdoor Springfield to a modern, semi-automatic fighting rifle in the M1 Garand.

Modernized & Economical Muzzleloaders: The CVA Optima XP & XP-SB

CVA's longest-lasting muzzleloader design, the Optima, has been updated in 2026 with "modern ergonomics and modularity."

Interests



Get the best of American Rifleman delivered to your inbox.