The Grand Power Stribog family completely disrupted the pistol caliber carbine market. While the 9mm variants get a lot of attention, shooters who want serious cross-sectional mass and terminal performance look straight at the big-bore powerhouse: the Stribog SP45.
Running .45 ACP through a smooth, roller-delayed blowback sub-gun is an incredible shooting experience. Out of the box, it is inherently subsonic, incredibly controllable, and makes an exceptional home defense or close-quarters tool. But the second you start treating the SP45 like a serious defensive weapon system, you run face-first into a frustrating design limitation: the factory real estate problem.
An 8-inch barrel gives you great ballistics, but the factory receiver rail ends abruptly. Once you mount a red dot, a weapon-mounted light, and a tape switch, your support hand is trapped in a compressed, awkward position.
We don’t follow the market; we build what it’s missing. To unlock the full potential of your heavy-hitting PCC, we engineered the definitive solution: the KDG SRX Stribog Rail Extension – (.45 ACP & 10mm)
THE PROBLEM WITH CONVENTIONAL ACCESSIZING ON THE SP45
When managing the recoil of a larger caliber like .45 ACP, a proper grip isn’t a luxury—it’s a requirement. Modern shooting techniques dictate a forward, extended support hand (like a C-clamp grip) to drive the gun between targets and mitigate muzzle rise.
If you try to do this on a stock SP45, you immediately run out of handguard. Your hand bumps into your light, your thumb crowds your optic line of sight, and your grip becomes compromised. Furthermore, if you attach a suppressor, you lose access to the muzzle devices and add front-heavy bulk without any protective coverage.
We looked at the architecture of the big-bore Stribog receiver and realized it needed an extension that looked, felt, and performed like a seamless factory upgrade.
ENTER THE SRX BIG-BORE RAIL EXTENSION
The KDG SRX (Rail Extension) series is already legendary for the FN SCAR and the 9mm Stribog platforms. Now, we have completely overhauled the mounting interface to align with the larger receiver dimensions of the SP45 and SP10 variants.
The SRX adds critical inches of premium M-LOK real estate exactly where you need it most. It bridges the gap between your receiver and your muzzle, giving you a smooth, continuous handling surface.
The Suppressor Integration Advantage: The SRX features a generous 1.7-inch internal diameter. This allows you to tuck your favorite sub-gun silencer directly inside the rail extension. It keeps your overall length compact for tight spaces while maximizing your usable grip space over the suppressed barrel.
ENGINEERED FOR REAL-WORLD USE: KEY FEATURES
We didn’t design this rail extension to sit on a showroom floor. It was built to handle real-world training, heavy recoil, and hard abuse.
- Extended Ergonomics: Gives you the necessary real estate to run a full, modern extended grip, giving you maximum leverage over the SP45 recoil impulse.
- Optimized Accessory Placement: Push your defensive weapon lights as far forward as possible, completely eliminating barrel shadow and clearing space for your pressure pads.
- Seamless Mechanical Lockup: Our multi-point mounting chassis secures directly to the factory receiver geometry. Once torqued down, it becomes an unyielding, rigid extension of the upper.
- No Added Fluff: Precision-machined from an extrusion of 6061-T6 aluminum and finished with a flat, durable hardcoat anodize or cerakote. Every cut is functional; every angle has a purpose.
PRE-PRODUCTION SPECIFICATIONS
True to our engineering standards, our spec data is transparent, exact, and built for shooters who care about the fine details.
[PRODUCT SPECIFICATION DATA]
PRODUCT: KDG SRX Stribog Rail Extension – (.45 ACP & 10mm)
PRIMARY COMPATIBILITY: STRIBOG SP45 / SP10
MATERIAL: 6061-T6 AIRCRAFT-GRADE ALUMINUM
FINISH: ANODIZED TYPE III HARDCOAT or Cerakote
INTERNAL DIAMETER: 1.70 INCHES (SUPPRESSOR READY)
INTERFACE: M-LOK (SIDES/BOTTOM) // EXTENDED TOP PICATINNY
AVAILABLE: Q3 2026
GAIN THE ADVANTAGE
You chose the SP45 because you refused to compromise on stopping power or platform reliability. Don’t compromise your grip, your lighting placement, or your control just because the factory receiver ran out of room.
The KDG SRX Stribog Rail Extension – (.45 ACP & 10mm) gives your large-caliber PCC the ergonomics and modularity it deserves. Prepare your setup for the next evolution, upgrade your workspace, and gain the advantage.
