XTS 1913 Fixed Buffer Tube Adaptor 1913 Picatinny Rail to AR Buffer Tube 7075 Aluminum Construction Black XTS 1913FIXA UPC 767820118802
Product Description
The XTS 1913 Fixed Buffer Tube Adapter (MPN: XTS-1913FIXA) is a precision-engineered stock interface adapter designed to attach standard AR-15 carbine buffer tubes and receiver extension stocks directly onto firearms equipped with a rear 1913 Picatinny rail interface. Precision CNC-machined from ultra-durable 7075-T6 aircraft-grade aluminum, this fixed mounting module provides a rock-solid, zero-movement connection for SIG MCX/MPX, Ruger LC Carbine, CZ Scorpion, AK adapters, and custom PCC platforms.
Featuring a hardcoat anodized black protective finish, the XTS-1913FIXA eliminates stock play and flex, ensuring a stable shoulder weld during rapid strings of fire. The rear female threading accepts all standard Mil-Spec or Commercial-spec AR-15 buffer tubes, enabling shooters to mount their preferred collapsible carbine buttstocks or stabilizing pistol braces to non-AR bufferless firearm chassis.
Engineered with dual heavy-duty steel clamping screws, the XTS-1913FIXA mounts securely to any standard rear MIL-STD-1913 Picatinny rail section without specialized tools or custom modification. Backed by XTS quality assurance, it offers a reliable, high-strength solution for modern bufferless rifle and pistol-caliber carbine builds.
Armorer Bench Notes & Real-World Staging Guidance:
Fitment Matrix: Mounts to any rear vertical 1913 Picatinny rail endplate (SIG SAUER MCX/MPX, Ruger LC Carbine/PC Charger, CZ Scorpion EVO with 1913 endplate, AK 1913 stock adapters, B&T, and BRN-180 bufferless lower receivers). Accepts all standard 1-3/16"-16 tpi AR-15 carbine buffer tubes (Mil-Spec or Commercial). (Note: This is a FIXED adapter and does not fold; for folding applications, a side-folding hinge mechanism is required).
- Perform a complete firearm safety check: drop the magazine, lock the bolt rearward, and visually inspect the chamber to verify zero live rounds are present.
- Loosen the dual clamping screws on the side of the XTS-1913FIXA adapter using an Allen wrench.
- Slide the clamp interface downward over the rear vertical 1913 Picatinny rail section of your firearm until properly seated in the desired rail slot.
- Torque the side clamping screws evenly to manufacturer specification (25–30 in-lbs) to lock the adapter onto the rail.
- Thread your AR-15 buffer tube into the female rear threads of the adapter until hand-tight, align the buffer tube timing notch/stock indexing channel vertically, and secure with a standard castle nut and endplate if applicable.
- Install your preferred carbine buttstock or brace, performing a shoulder weld test to verify rock-solid stability.
Key Features
- 7075-T6 Aircraft-Grade Aluminum: Forged and CNC-machined from high-strength 7075 aluminum for maximum shear resistance and lightweight durability.
- 1913 Picatinny to AR Buffer Tube Conversion: Adapts rear 1913 rail sections to accept any standard AR-15 carbine receiver extension tube.
- Type III Hardcoat Anodized Black Finish: Deep-penetration matte black surface treatment protects against chemical corrosion, scratches, and wear.
- Dual Heavy-Duty Steel Rail Clamps: Twin locking screws ensure rock-solid clamping pressure against the Picatinny rail with zero wobble.
- Universal Non-AR / Bufferless Platform Mounting: Ideal for SIG MCX/MPX, CZ Scorpion, BRN-180, AK 1913 adapters, and PCC chassis.
- Direct Drop-In Installation: Mounts quickly to standard MIL-STD-1913 rail endplates without permanent weapon modification.
Product Specifications
- Brand: XTS (Xtreme Tactical Sports / DMA Inc.)
- Model/Series: 1913 Fixed Buffer Tube Adapter
- MPN / SKU: XTS-1913FIXA
- UPC: 767820118802
- Mount Type: Rear MIL-STD-1913 Picatinny Rail Clamp
- Thread Interface: Standard AR-15 Buffer Tube (1-3/16"-16 tpi)
- Platform Compatibility: Bufferless Firearms w/ Rear 1913 Rail (SIG MCX/MPX, CZ Scorpion, AK 1913 Adapters, BRN-180, PC Charger)
- Material: 7075-T6 Aircraft Aluminum Body / Steel Screws
- Finish / Color: Hardcoat Anodized Matte Black
- Mechanism Type: Fixed (Non-Folding)
- Weight: 3.2 oz
- Country of Origin: USA / Imported
