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Armaspec Stealth Recoil Spring (SRS) Gen 4 Captured Buffer - H2 Weight - ARM253-H2
Product Description
Upgrading a modern sporting rifle, tactical carbine, or custom AR-15 pistol for high-velocity tracking and precision split times frequently exposes an immediate mechanical and acoustics bottleneck: standard mil-spec buffer assemblies. Traditional buffer trains rely on loose internal weights sloshing inside a metal shell, dragging against an unguided buffer spring. This crude architecture generates a loud, frustrating "cheese-grater" scraping noise inside the buffer tube, infuses the stock with secondary spring harmonic vibrations, and creates a harsh, erratic recoil impulse that pulls your red dot off-target during rapid-fire strings. The **Armaspec® Stealth Recoil Spring™ (SRS) Gen 4 Captured Buffer (H2 Weight)** completely eliminates these platform boundaries, replacing multi-piece loose weights with a self-contained, multi-stage captured recoil engine built straight to match-grade aerospace tolerances.
Precision CNC-machined in the United States from premium high-tensile structural steel alloys, this Generation 4 performance upgrade drops a dual-stage captured guidance rod directly into your lower receiver setup. At its core is an independent center guide rod that keeps the single, precision-wound spring from bowing or rubbing along the internal walls of your buffer tube. This cuts out spring grind, yielding an incredibly slick, frictionless action stroke. Calibrated as a dedicated **H2 heavy mass block**, the core is packed with high-density tungsten weight segments to yield an equivalent buffer mass of approximately **4.7 ounces**. This heavy-inertia footprint is explicitly engineered to delay bolt unlock timing, slow down excessive carrier velocity, and safely mitigate the violent over-gassed backpressure inherent to mid-length gas systems, suppressed tactical lanes, and short-barreled rifles (SBRs).
In high-stakes competitive strings, suppressed tactical drills, or critical self-defense frames, the advanced mechanical timing of the Gen 4 Stealth Recoil Spring maximizes your shot-to-shot consistency. The front end is outfitted with a re-engineered, high-density elastomer rubber bumper that cushions the bolt carrier group at the peak of its reward cycle, flattening out muzzle flip and softening perceived felt recoil. Because the system is completely captured, it stops the common cycling glitches associated with varying gas port pressures when shifting between standard unsuppressed ammunition and heavy defensive loads. Complete with an incredibly fast drop-in layout, this premium buffer system replaces sluggish cycling with pure mechanical authority.
*Armorer Bench Notes & Technical Field Assembly Guidance: The Armaspec SRS Gen 4 H2 variant (SKU: ARM253-H2) features a direct-fit user upgrade configuration explicitly tailored for **standard Mil-Spec Carbine-Length receiver extension tubes**. CRITICAL MOUNTING & LOCKUP INSTRUCTIONS: This captured recoil system is designed for native drop-in fitment inside carbine-length tubes. If you are installing this hardware into a full-length Fixed A2 Rifle Stock Tube or a specialized VLTOR A5 length system, you *must* slide a specialized polymer spacer (sold separately) into the back of the tube first on your workbench to preserve correct spring pre-tension and timing gates. **Operating Advisory:** Because the SRS unit is entirely self-contained, the standard buffer retainer pin and spring inside your lower receiver are technically no longer required to hold it under pressure; you can leave them installed or remove them completely for an effortless drop-in/drop-out bench teardown layout. Keep the main guide rod lightly wiped down with a thin film of fine synthetic oil to preserve its glassy smooth slide tracking movement.
Key Features
- Silent Gen 4 Captured Drive: Replaces loose factory buffer weights and raw springs with a guided single-rod engine, permanently eliminating "cheese-grater" spring scraping noises.
- Heavy-Inertia H2 Weight Rating: Pre-packed with a combination of steel and high-density tungsten mass blocks totaling ~4.7 oz to flatten out over-gassed mid-length systems and suppressed carbines.
- Frictionless Center Guidance Rod: Built over a precision center steel rod that blocks spring bowing, ensuring an exceptionally smooth, linear bolt carrier group tracking stroke.
- Upgraded Kinetic Bumper: Features a re-engineered Gen 4 polymer elastomer front bumper that cushions the cycling bolt block to drastically flatten out muzzle rise and secondary flip.
- Failsafe Generation 4 Architecture: Upgraded internal lock rings and refined spring rates enhance structural core longevity across intense firing schedules.
Product Specifications
- Brand: Armaspec
- Model Line: Stealth Recoil Spring™ (SRS) Gen 4 Captured Buffer Series
- MPN/SKU: ARM253-H2
- UPC Code Profile: 810048492701
- Firearm Platform Focus: AR-15 / M4 Carbine and Variant Lower Receivers
- Caliber Focus Optimization: 5.56 NATO / .223 Rem Carbines, Mid-Length Gas Systems, and Suppressed SBRs
- Buffer Mass Rating: H2 Equivalent Configuration (Approximately 4.7 Ounces / 133.2 Grams Core Mass)
- Buffer Tube Interface Fitment: Standard Mil-Spec Carbine Receiver Extensions
- Chassis Core Construction: CNC-Machined High-Tensile Structural Tool Steel Rod
- Weight Material Composites: Hardened Steel and High-Density Matte Tungsten Mass Blocks
- Front Kinetic Dampener: Gen 4 High-Durometer Impact-Absorbing Rubber Bumper
- Exterior Finish Treatment: Matte Non-Reflective Natural Industrial Melnite/Oxide Protective Finish
- System Interface Style: Fully Assembled Single-Piece Captured System
- Net System Weight: ~4.70 oz Core Reciprocating Weight
- Country of Manufacture: United States of America
