Description
The Stribog SP9 is a fun little platform, but the stock forend leaves your support hand crowded up near the mag well. Kinetic Development Group's SRX6 MK2 fixes that by bolting six extra inches onto the front of your receiver, giving you a longer reach, a more planted grip, and a whole lot more rail to work with. It fits Stribog SP9 models with M-LOK receivers and attaches directly to the gun using a mounting bridge, clamps, and all the hardware you need in the box.
What the SRX6 MK2 Brings to Your Stribog
The extension runs full-length M-LOK slots down the sides and bottom, plus T-marked Picatinny up top, so you've got real estate for a weapon light, laser, vertical grip, or handstop wherever you want it. The contoured profile is shaped to fill your hand naturally rather than feeling like a fat tube, and the machined ventilation slots help shed heat during longer strings. Built from 6061-T6 aircraft-grade aluminum and finished in black Cerakote, it stays light while taking a beating. Total weight lands around 7.7 ounces depending on configuration, and overall length comes out to roughly 9.8 inches.
Suppressor Room and the MK2 Install Update
The 1.72-inch internal diameter clears most common 9mm cans, and folks running setups like a Rugged Obsidian 9 or Obsidian 45 report an easy fit with the extra ventilation keeping the grip surface manageable. One big MK2 improvement is the hardware itself. KDG now uses the same screws across all the components, which streamlines assembly and takes some of the fiddle out of the build compared to the original.
A Note Before You Order
Worth knowing up front: because the SRX6 pushes the receiver length out past the muzzle, it needs to be run with either a suppressor or KDG's matching SMX6 muzzle extension so nothing sits exposed in front of the barrel. Plan your muzzle setup accordingly. Once it's dialed in, this is one of the cleaner ways to turn a compact Stribog into a longer, steadier, accessory-ready shooter.
Key Specifications
- Model: SRX6 MK2
- Manufacturer: Kinetic Development Group
- Manufacturer Part Number: STR5-MK2-020
- UPC: 850045704537
- Fit: Grand Power Stribog SP9 with M-LOK receiver
- Extension Length: 6 inches
- Overall Length: 9.8 inches
- Material: 6061-T6 Aircraft-Grade Aluminum
- Finish: Black Cerakote
- Mount Type: Direct Receiver Attachment
- Rail Interface: Full-length M-LOK with T-marked Picatinny on top
- Internal Diameter: 1.72 inches
- Weight: Approx. 7.7 oz
- Color: Black
What’s Included
- SRX6 MK2 rail extension (1)
- Mounting bridge
- Clamps
- All necessary installation hardware
Frequently Asked Questions
Will the SRX6 MK2 fit my Stribog SP9?
It's built specifically for Grand Power Stribog SP9 models that have an M-LOK receiver. It attaches directly to the receiver using the included mounting bridge, clamps, and hardware. If your Stribog uses the M-LOK receiver, you're good to go.
Do I need a suppressor or muzzle device to run the SRX6 MK2?
Yes. Because the extension pushes the receiver length out past the muzzle, it has to be paired with either a suppressor or KDG's matching SMX6 muzzle extension so nothing is left exposed in front of the barrel. Plan that part of your setup before install.
What size suppressor will fit inside the SRX6 MK2?
The internal diameter is 1.72 inches, which clears most common 9mm cans. Owners have had good luck with suppressors like the Rugged Obsidian 9 and Obsidian 45. The ventilation slots also help keep heat off the grip during longer sessions.
How hard is the SRX6 MK2 to install?
It takes a little more effort than a simple bolt-on rail since you're removing the front sight and installing clamps into the receiver, but it's designed to be done at home. The MK2 update uses the same screws across all components to simplify the process. Read through the instructions fully before starting, and check your fasteners for tightness after install.




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