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DoubleStar® ACE™ M4 / Mk12 Mod H SOCOM Gen 4 Tactical Buttstock Assembly – 6061-T6 Billet Aluminum Core – Closed-Cell Foam Cheek Weld Overtube – 5-Position Adjustable – Meat-Tenderizer Strike Face – Matte Black Anodized – A150
Product Description
The DoubleStar® ACE™ M4 / Mk12 Mod H SOCOM Gen 4 Tactical Buttstock Assembly (A150) represents a legendary mechanical milestone in severe-duty combat stocks, close-quarters tactical breaching logistics, and historic retro military clone staging, proudly machined and assembled natively by American operators in Winchester, Kentucky, USA. Originally engineered to eliminate every single fragile failure point inherent to standard plastic mil-spec stocks, the ACE SOCOM is globally recognized as one of the strongest, most indestructible rifle tracking interfaces ever introduced to the AR-15 and M16 platforms. Famously chosen by elite American special operations units for the iconic Mk12 Mod H (Holland) sniper rifle system, this heavy-duty hardware engine replaces shifting polymer components with an unyielding monolithic block of aircraft metal. This premier system asset (841348101994) grants you total structural, mechanical, and tactical authority over your high-performance carbine layout.
The foundational structural victory of this deployment-grade stock relies on its heavy-wall integrated 6061-T6 billet aluminum receiver extension tube and aggressive "meat-tenderizer" front strike plate. Unlike traditional collapsible stocks that slide loosely over a separate thin-walled buffer tube—introducing annoying frame play, rattling, and structural flex—the ACE SOCOM is machined as a cohesive, rigid framework. The receiver extension is up-to six times stronger than a standard commercial or mil-spec tube, making it entirely impervious to bending, cracking, or shearing during violent breaching maneuvers or martial butt-stroke applications. The front face of the buffer bracket features an aggressive, machined strike pattern optimized for tactical glass breaking or structural deflection in close-quarters combat (CQB). This rigid metal skeleton is enveloped in a premium closed-cell foam overtube cover that insulates the shooter's face from extreme environmental heat or freezing cold while providing a plush, repeatable cheek weld registration loop.
The true operational triumph of this military-vetted stabilization engine centers on its **5-position positive locking gusset system and multi-point sling logistics**. The Gen 4 architecture offers an adjustable length of pull (LOP) ranging from 7.5 inches to 9.5 inches (10.0 inches extended with the included 0.5-inch rubber recoil pad), compressing tightly via a reinforced mechanical push-button detent. Once the locking lever snaps into position, the stock locks up with the unyielding physical rigidity of an A2 fixed stock. Outfitted with dual-loop ambidextrous sling loops at the receiver endplate alongside dual integrated rear quick-detach (QD) swivel sockets, the SOCOM adapts effortlessly to advanced tactical carrying harnesses. Weighing a solid, mass-optimizing 19.0 ounces, this rear engine beautifully balances front-heavy suppressed barrels or thermal optics setups down your rail line.
Includes: (1) Authentic DoubleStar ACE M4 SOCOM Gen 4 Billet Aluminum Stock Body, (1) Integrated Heavy-Wall Carbine Receiver Extension Tube with Pre-Installed Closed-Cell Foam Cover Sleeve, (1) Integrated Ambidextrous Sling Eyelet Loop Endplate, (1) Propounded Heavy Castle Locking Nut, and (1) 0.5-Inch Shock-Absorbing Rubber Buttpad, Packed inside Original Branded Factory Sealed Retail Packaging.
*Administrative Armorer Staging, Custom Installation Wrench & Recoil Buffer Guidance: The DoubleStar ACE A150 is an integrated structural stock system. **CRUCIAL ARMORER WRENCH COMPATIBILITY WARNING:** This stock assembly utilizes a proprietary oversized heavy castle nut system to achieve its extreme structural rating; standard commercial or mil-spec castle nut wrenches are too small and WILL NOT interface with this hardware. Installation explicitly requires a classic CAR-1style spanner wrench or a dedicated armorers wrench tool with a vintage CAR hook (not included). **RECOIL COMPONENT COMPLIANCE REMOVED:** This specific model is a stock-and-tube assembly layout only; standard carbine-length recoil springs and standard CAR-specification H/H2/H3 buffers must be sourced independently to match your specific upper receiver gas system. During bench assembly, lightly coat the receiver threads with anti-seize compound and torque the proprietary lock ring to 35 foot-pounds. Ensure your host firearm is fully unloaded, the magazine is removed, and the chamber is verified visually clear before beginning work on your workbench deck.
Key Features
- Battle-Proven Mk12 Mod H Heritage: The official, highly sought-after factory component choice for correct military-spec Mk12 Mod H "Holland" retro precision sniper builds.
- 6061-T6 Billet Aluminum Core: Monolithic aircraft-grade aluminum framework completely eliminates the wobble, rattle, and cracking liabilities of legacy plastic stocks.
- Integrated Breaching Strike Plate: Features a aggressive, heavily textured "meat-tenderizer" front strike face built directly into the bracket for CQB environment clearing.
- Closed-Cell Foam Cheek Weld: Equipped with a premium, non-absorbent foam overtube sleeve that delivers a comfortable cheek weld while shielding skin from thermal extremes.
- 5-Position Gusset Locking Matrix: Offers smooth adjustment from 7.5" to 9.5" via a push-button mechanism that achieves absolute fixed-stock rigidity when locked.
- Ambidextrous Tactical Sling Assets: Merges a dual-loop front sling endplate with dual integrated rear QD receiver ports for seamless sling configurations.
Product Specifications
- Brand: DoubleStar® Corp. / ACE™ Limited Stocks (Precision machined, hardcoat finished, and endurance verified natively in Winchester, Kentucky, USA)
- Product Line: Severe-Duty Billet Aluminum Stock Assemblies & Tactical Small Arms Control Systems
- Model Series Designation: M4 / Mk12 SOCOM Gen 4 Collapsible Aluminum Stock
- SKU / MPN: A150 (Alternative Industry Identifiers: ACE01500 / DS-A150 / 11053209)
- UPC Barcode Number: 841348101994
- Firearm Platform Compatibility: Standard Mil-Spec AR-15, M16, M4, and AR-10 / LR-308 Lower Receiver Blocks
- Build Application Niche: Mk12 Mod H Holland Retro Clone Compliance & Close Quarters Battle (CQB) Deflection
- Chassis Body Metallurgy: CNC-Machined Solid 6061-T6 Aircraft Grade Billet Aluminum Hull
- Surface Armor Finish Profile: Military-Spec Type III Hardcoat Anodized Matte Black Finish Shroud
- Cheek Weld Interface Matrix: High-Density Non-Porous Closed-Cell Foam Overtube Protection Sleeve
- Adjustment Range Metric: 5-Position Adjustable Corridor providing 7.50" to 9.50" Length of Pull (LOP)
- Overall Component Length: 10.00 Inches Extended (From Face of Receiver to Edge of Cushion Pad)
- Recoil Buttpad Profile: 0.50-Inch Solid High-Damping Non-Slip Rubber Recoil Pad
- Internal Buffer Standard: Requires standard CAR-length spring and CAR carbine buffer (Not Included)
- Installation Fastener Interface: Proprietary Heavy CAR-Style Locknut (Requires CAR Spanner Wrench for Setup)
- Product Net Component Weight: ~19.00 oz (~1.18 lbs) Mass-Balanced Counterweight Foundation
- Total Packaging Shipping Mass: ~1.85 lbs (Enclosed Inside Heavy Reinforced Factory Branded Retail Box Staging)
