*PLEASE USE CODE MW20 WITH THIS ITEM!*
Midwest Industries Combat Rail T Series 12 625 Inch AR 15 Free Float Quad Rail Handguard Black MI CRT12 625 UPC 812102031109
Product Description
The Midwest Industries® Combat Rail T-Series 12.625" Free Float Handguard (SKU: MI-CRT12.625 / UPC: 812102031109) delivers structural rigidity and continuous 360-degree rail real estate for hard-use AR-15 combat carbines and duty rifles. Measuring an exact 12.625 inches in overall length, this handguard is purpose-built to provide full barrel coverage on 13.7-inch, 13.9-inch, 14.5-inch, and 16-inch barrels while maintaining optimal clearance for muzzle devices, suppressors, and quick-detach silencer mounts. Free-floating the barrel eliminates operational hand pressure deflection, maximizing mechanical accuracy and consistency across varying shooting positions and barricade rests.
Engineered for maximum structural integrity, the T-Series rail is precision CNC-machined from high-strength 6061-T6 billet aluminum extrusion and coated in a rugged MIL-A-8625 Type III Class 2 Hardcoat Anodized finish. This military-grade surface treatment withstands severe chemical bore solvents, heavy carbon fouling, and abrasive field environments. Clamping force is distributed through a 4140 heat-treated steel barrel nut paired with Midwest Industries' patented 4140 heat-treated torque plate system. The integrated anti-rotation receiver tabs mechanically lock the rail against the upper receiver, preventing rotational slip even during catastrophic drops or sustained weapon-manipulation torque.
Featuring a true MIL-STD-1913 Picatinny profile across all four quadrants, this handguard offers solid mounting planes for tactical weapon lights, infrared laser aiming devices (such as PEQ-15, NGAL, and DBAL units), vertical foregrips, and bipods without the risk of flex or rail deflection. Two integral, anti-rotation QD sling sockets located at the 3 and 9 o'clock forward positions prevent sling twisting during tactical movements. Included directly from the factory are the proprietary barrel nut, heat-treated torque plate, mounting hardware, and dedicated barrel nut wrench, providing armorer-ready installation out of the box.
*Armorer Bench Notes & Real-World Staging Guidance:*
Fitment Matrix: Designed for standard Mil-Spec AR-15 and M4 flat-top upper receivers. Requires a low-profile gas block (.750" or .625" journal). CRITICAL ARMORER NOTICE: Handguard internal diameter is 1.300 inches and will NOT accommodate suppressors tucked inside the rail. Do NOT use on AR-10/LR-308 large-frame platforms. Apply Aeroshell 33MS or Mil-Spec lithium-moly grease to upper receiver barrel nut threads. Torque barrel nut to 35-50 ft-lbs. Handguard cross-bolts must NOT exceed 40 in-lbs of torque; over-torquing may damage the clamping plate or aluminum ears.
- Ensure the host firearm is completely clear, magazine removed, and chamber visually and physically verified empty. Secure the upper receiver in an armorer-grade internal spline rod or non-marring receiver vise block.
- Clean and inspect receiver threads, apply a light coat of Aeroshell 33MS grease to receiver barrel extension threads, and slide the barrel firmly into the upper receiver socket.
- Thread the included 4140 steel barrel nut onto the receiver. Using the provided Midwest Industries barrel nut wrench and a calibrated torque wrench, torque the barrel nut to 35 to 50 ft-lbs, cycling torque three times to season the threads before final torque application.
- Install the low-profile gas block and gas tube assembly, verifying alignment and gas port timing. Slide the T-Series handguard straight over the barrel and onto the barrel nut, ensuring the dual anti-rotation tabs straddle the upper receiver cleanly.
- Insert the patented 4140 heat-treated torque plate into the underside slot, install the two cross-bolts, and tighten them progressively and evenly with an inch-pound torque wrench to 40 in-lbs; conduct a visual alignment check across the top Picatinny rail interface before live-fire staging.
Key Features
- True MIL-STD-1913 Quad Rail: Continuous 12 o'clock Picatinny rail with full-length 3, 6, and 9 o'clock rails accommodates laser aiming systems, tactical weapon lights, and grips with zero deflection.
- Patented 4140 Torque Plate Clamping: Heavy-duty heat-treated 4140 steel torque plate locks the handguard securely to the barrel nut, mitigating recoil shifting.
- Built-In Anti-Rotation Tabs: Integrated receiver alignment tabs eliminate rotational play under heavy sling tension or impact abuse.
- 6061-T6 Billet Construction: Precision-extruded and CNC-milled aluminum delivers strength and impact tolerance at an installed weight of 14.6 ounces.
- Type III Hardcoat Anodizing: MIL-A-8625 Class 2 matte black finish resists scratches, corrosive perspiration, bore cleaners, and high heat.
- Integrated Anti-Rotation QD Sockets: Forward 3 and 9 o'clock quick-detach sling swivel sockets prevent sling tangling during maneuvers.
- Complete Armorer Hardware Kit: Comes standard with 4140 heat-treated steel barrel nut, torque plate, cross-bolts, and custom barrel nut wrench.
Product Specifications
- Brand: Midwest Industries®
- Model/Series: Combat Rail T-Series One-Piece Free Float Handguard (12.625")
- MPN / SKU: MI-CRT12.625 / MICRT12625
- UPC: 812102031109
- Platform Compatibility: Mil-Spec AR-15 / M4 / M16 Receivers
- Handguard Profile: MIL-STD-1913 Picatinny Quad Rail
- Overall Length: 12.625 inches
- Internal Diameter: 1.300 inches
- Exterior Width: 2.150 inches
- Exterior Height: 2.430 inches
- Material: 6061-T6 Aluminum (Handguard) / 4140 Heat-Treated Steel (Barrel Nut & Torque Plate)
- Finish: MIL-A-8625 Type III Class 2 Hardcoat Anodize (Matte Black)
- Included Hardware: 4140 Steel Barrel Nut, Torque Plate, Clamping Screws, Barrel Nut Wrench
- Country of Origin: United States
