Mesa Tactical Magazine Extension Tube Clamp with Picatinny Rail for Remington 870/1100/11-87 & Mossberg 930 12 Gauge Aluminum Matte

The Mesa Tactical Magazine Extension Tube Clamp with Picatinny Rail is a shotgun accessory engineered to lock your barrel and extended magazine tube into one solid, vibration-free assembly. Built from aluminum and finished in matte, this clamp works with Remington 870, 1100, and 11-87 shotguns, as well as the Mossberg 930 in 12 gauge—making it a versatile choice for tactical shooters, home defenders, and competitive shooters who demand rock-solid stability from their shotgun platform.

The clamp's core function is simple but effective: two steel Allen head screws draw the clamp halves tight around your barrel and magazine tube, creating a rigid connection that eliminates flex and rattle. That solid lockup improves sight picture consistency and reduces unwanted movement when shouldering or manipulating your gun. The design also incorporates left- and right-side sling swivel sockets that accept standard pushbutton swivels, giving you mounting points for tactical slings without drilling or permanent modification.

What sets this Mesa Tactical clamp apart is its integrated 2-inch Picatinny rail, mountable at the 3 or 9 o'clock position. This MIL-STD 1913 rail opens the door to mounting lights, lasers, or other mission-specific optics directly to your shotgun's magazine tube—a huge advantage for low-light work or dedicated tactical setups. The clamp also functions as a light mount itself: slip a 1-inch diameter tactical light into one side of the clamp and secure it against your barrel or magazine for hands-free illumination.

Aluminum construction keeps weight minimal while maintaining durability. This is the kind of no-frills, purpose-built shotgun accessory that works as hard as you do, whether you're running drills at the range, prepping for competition, or building a serious home-defense shotgun.

Key Features

• Locks barrel and extended magazine tube together into a rigid, non-slip assembly
• Two steel Allen head screws provide secure, tool-adjustable clamping
• Integrated 2-inch MIL-STD 1913 Picatinny rail (3 or 9 o'clock mounting positions)
• Left and right sling swivel sockets for standard pushbutton swivels
• Doubles as a 1-inch diameter tactical light mount
• Lightweight aluminum construction with matte finish
• Fits Remington 870, 1100, 11-87 and Mossberg 930 shotguns in 12 gauge

Specifications

Frequently Asked Questions

Will this clamp work on my Remington 870 or Mossberg 930?

Yes. The Mesa Tactical clamp is designed specifically for Remington 870, 1100, and 11-87 shotguns, as well as the Mossberg 930, all in 12 gauge.

Can I mount a tactical light to this clamp?

Yes, in two ways. You can install a 1-inch diameter light directly into one side of the clamp and secure the other side to your barrel or magazine tube. Additionally, the integrated 2-inch Picatinny rail can accept dedicated rail-mounted lights and accessories.

Where can I position the Picatinny rail?

The rail can be installed at either the 3 o'clock (right side) or 9 o'clock (left side) position, giving you flexibility in mounting lights, lasers, or other tactical gear to suit your shooting style.

What kind of sling can I attach?

The clamp includes left and right sling swivel sockets that accept standard pushbutton swivels, compatible with most modern tactical slings and traditional two-point sling setups.