A Really Bad Design Signature Series
Sig Sauer MPX Copperhead
Gulf Borderland || 9mm || 3.5" Barrel
This very gun was featured at the Cerakote booth at SHOT Show 2026 and it now can be yours.
A Really Bad Design has taken the custom Cerakote job by storm. In 2024 they perfected the Cell-Shading technique often referred to as "Borderland." Although not the first one to do it, A Really Bad Design are the best doing it.
Inspired on the famous Gulf livery colors this cell shading work is unmatched.
The MPX Copperhead features a monolithic Elite Series Cerakote finish upper receiver, with an integrated stock knuckle lower, and a 3.5" barrel with integrated flash hider.
Unconventional design, unmatched performance, and familiar AR handling.
The SIG MPX redefines the submachine gun category with a new level of operator safety, in-field adaptability and proven reliability in the harshest environments.
Completely ambidextrous, the SIG MPX is great for left- or right-handed shooters with its dual-sided selector switch, magazine release, charging handle and bolt release.
The SIG MPX operates from a fully-closed and locked rotating bolt, offering enhanced reliability and safety in use.
A short-stroke gas piston allows the SIG MPX to run all weights and brands of 9mm ammunition with no adjustments to the gas valve.
Optic, flashlight, and helmet NOT included. For illustration only.
MPX COPPERHEAD PIST 9MM 3.5" PMPX-3B-CH Manufacturer Model Number: PMPX-3B-CH Manufacturer: SIG SAUER Model: MPX Copperhead Caliber: 9mm Type: Semi-Auto Pistol Item Type: Firearm Firearm / Accessory Action: Semi-Auto Firearm / Accessory Capacity: 20 + 1 Finish: Coyote Elite Series Cerakote Sights: No Sights Stock Frame Grips: Alloy Frame PCB (Pivoting Contour Brace) Alloy Frame Magazine Quantity and Description: 1 20 rd. Magazine Overall Length: 14.5" Weight: 4.5 lbs. Shipping Weight: 7.4 Feature: Pivoting Contour Brace Feature: Integrated Flash Hider Feature: Monolithic Upper Receiver Optic Adjustable Objective: false Optic Reticle Illuminated: false, A Really Bad Design, ARBD, Borderland, Gulf
