Kinetic Development Group
KDG SRX3.25 MkII Stribog Rail Extension
Compact 3.25-inch Stribog SP9 M-LOK extension with two full bottom slots and a 1.72-inch internal diameter.
Quick Specs
- Price
- $242
- Weight
- 6.2 oz
- Brand
- Kinetic Development Group
- Category
- handguard
Features
- •Adds 3.25 inches; 5-inch overall length
- •6061-T6 aluminum, Type III hardcoat
- •4.2 oz rail; 6.2 oz installed
- •1.72-inch internal diameter
- •Fits Stribog SP9 M-LOK receivers
Capability Boosts
Recommended For
Compatibility Tags
Overview
The SRX3.25 MkII is KDG's compact Stribog extension. It adds 3.25 inches ahead of the factory forend—enough for a second full bottom M-LOK slot—without the reach and installed weight of the SRX6. The rail is 6061-T6 aluminum, measures 5 inches overall, and weighs 6.2 ounces with its bridge and clamps.
The 1.72-inch internal diameter can shroud compatible muzzle devices and suppressors, but that clearance comes with a hard safety boundary: KDG requires an SMX3, SMX6, suppressor, or another device that extends the muzzle past the rail. KDG specifically says the B&T VERS36 Ti does not fit. The black catalog SKU is STR5-MK2-010; FDE sibling STR5-MK2-110 is selected on the same page.
Key Features
- Adds 3.25 inches to the Stribog SP9 forend
- Two full bottom M-LOK slots
- 1.72-inch internal diameter
- MkII unified hardware
- Black and FDE variants
Pros
- +Shorter and lighter than the SRX6
- +Adds useful support-hand and accessory space
- +Exact black SKU is distinct from the FDE sibling
Cons
- −Adds only one full bottom M-LOK slot beyond the factory forend
- −Requires a muzzle-extending device or suppressor
- −B&T VERS36 Ti is specifically excluded
Detailed Specifications
- Length
- Adds 3.25 inches; 5 inches overall
- Material
- 6061-T6 aluminum
- Finish
- Type III hardcoat black or FDE Cerakote
- weight
- 4.2 oz rail; 6.2 oz installed
- internalDiameter
- 1.72 inches
- compatibility
- Stribog SP9 models with M-LOK receivers
- sku
- STR5-MK2-010 (black); STR5-MK2-110 (FDE)
Compatible Platforms
Pairs Well With
Top matches
Ruger
Ruger Precision Rifle
1 shared compatibility tags
Aero Precision
Aero Precision SOLUS Competition Rifle
1 shared compatibility tags
Daniel Defense
Daniel Defense Delta 5 Pro
1 shared compatibility tags
B&T
B&T APC223 PRO 420 mm
1 shared compatibility tags
Sig Sauer
Sig MCX Virtus Patrol 16"
1 shared compatibility tags
Sig Sauer
Sig MCX Spear-LT 11.5"
1 shared compatibility tags
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Build Your Custom Configuration
Add the KDG SRX3.25 MkII Stribog Rail Extension to your build and see how it enhances your platform.