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Sylvan Arms® SA5 Pro Gen 5 Premium Side-Folding Stock Adapter – Fits AR-15 & AR-10 Platforms – CNC-Machined 4140 Steel – Right-Folding Hinge – Matte Black – SA5P-R
Product Description
The Sylvan Arms® SA5 Pro Gen 5 Premium Side-Folding Stock Adapter (SA5P-R) represents an advanced engineering triumph in modern tactical weapon concealment, vehicular staging, and lower receiver logistics, masterfully drawn in the USA to shrink your rifle's operational footprint without introducing structural fragility. Designed specifically for shooters looking to optimize backpack carry parameters, low-profile case storage, or rapid deployment loops inside compact vehicle cabins, this Gen 5 flagship completely overhauls the side-folding marketplace. While legacy aluminum folders on the market frequently develop sloppy hinge wobble, expand under hard recoil cycles, or introduce huge aesthetic extension gaps behind the lower castle nut, the SA5 Pro completely voids those mechanical failure points. This heavy-duty 4140 steel command adapter (811313033384) functions as an indispensable primary asset for tactical operators, close-quarters security teams, and custom personal defense weapon (PDW) builders.
The structural foundation of this high-efficiency folding adapter is precision CNC-machined from premium 4140 structural steel alloy, representing a monumental design shift that renders this Gen 5 unit an incredible 250% stronger than previous aluminum generations. Despite this massive leap in yield strength and structural elasticity, the entire low-profile housing weighs a remarkably slim 0.59 pounds (9.4 ounces). Sylvan Arms masterfully engineered the SA5 geometry to sit radically closer to the host receiver, minimizing physical extension gaps and keeping the rear tracking line clean and compact. The folding hinge swings smoothly to the right side of the receiver, providing right-handed operators an intuitive, mirrored folding interface that keeps the left flank of the receiver completely slick for side-slung transition drills or clean unhindered optics manipulation on the line.
The true operational triumph of this American-engineered adaptation system lies in its user-serviceable design and absolute multi-caliber platform integration. Outfitted with an adjustable hinge tension matrix, shooters can precisely tune the swing resistance to their exact physical handling preference, ensuring the stock stays anchored when folded yet snaps open instantly with single-handed mechanical authority. The interior features an improved, hardened buffer retaining pin built to withstand aggressive, violent cycle rates, working in perfect synchronization with the included 1045 steel bolt carrier group (BCG) extension sleeve. Standardized with 1-3/16”x16 threads to interface flawlessly with standard mil-spec receiver extensions across 5.56 NATO, 300 Blackout, .308 Winchester, and most 9mm AR-9 layouts, this premium adapter gives you absolute structural and organizational command over your deployment rifle setup.
Includes: (1) Authentic Sylvan Arms SA5 Pro Gen 5 Right-Folding Stock Adapter (Matte Black 4140 Steel Core, Dual QD Sling Sockets, Adjustable Hinge Detent Assembly), (1) 1045 Heavy-Duty Bolt Carrier Group Extension Sleeve, (1) Proprietary Red Castle Nut / Pocket Wrench Tool, and Original Branded Factory Sealed Retail Staging Presentation Boxing.
*Safety & Operational Deployment Guidance: The Sylvan Arms SA5P-R folding stock adapter is engineered solely as a transport, storage, and mobility concealment enhancer; the host firearm MUST be fully deployed and mechanically locked into the extended position prior to live fire. Attempting to fire the weapon while the stock is folded will result in immediate internal damage to the buffer pin mechanism, cycling failures, and potential user injury. Installation is straightforward and does not require weapon disassembly; ensure you utilize the included specialized red wrench to secure the adapter to your lower receiver shoulder. Prior to conducting bench modifications, always visually and physically verify that your rifle is completely unloaded, cleared, and safe.
Key Features
- CNC-Machined 4140 Steel Construction: Precision-milled from high-yield structural steel to provide a monumental 250% increase in shear strength over legacy aluminum variants.
- Right-Folding Strategic Orientation: Hinge swings cleanly off to the right side, providing a mirrored configuration favored by users looking to keep the left side of their frame completely flush.
- Reduced-Gap Slim Profile: Masterfully engineered to sit closer to the lower receiver frame, drastically cutting down on length gaps and maximizing aesthetics.
- Adjustable Hinge Tension Engine: Built-in tuneable detent screw allows operators to set custom resistance levels for the folding track, ensuring smooth, custom swing loops.
- Hardened Buffer Pin Upgrade: Equipped with a severe-duty, treated buffer retention pin to eliminate premature wear and shearing under intense blowback forces.
- Dual Side QD Sling Sockets: Features integrated quick-detach sling cups on both the left and right structural flanks, allowing unhindered tactical sling staging configuration.
Product Specifications
- Brand: Sylvan Arms® (Engineered and Manufactured natively in the USA)
- Product Line: Premium Mechanical Stock Adapters & Receiver Logistics Series
- Model Series Designation: SA5 Pro AR Folding Stock Adapter Gen 5 – Right Fold
- SKU / MPN: SA5P-R (Alternative Factory Identifiers: SA5PR / SYL-SA5P-R)
- Lower Receiver Interface: Standard Mil-Spec AR-15 & AR-10 Lower Receiver Backstraps
- Receiver Extension Threading: Standard 1-3/16" x 16 TPI (Accepts Mil-Spec & Commercial Buffer Tubes)
- Caliber Platform Cross-Compatibility: .223 Rem / 5.56mm NATO, .300 Blackout, 6.5mm Grendel, .308 Win / 7.62mm NATO, and standard 9mm AR-9 Profiles
- Chassis Core Composition: High-Tensile Heavy-Duty CNC-Machined 4140 Structural Alloy Steel
- Bolt Extension Sleeve Material: 1045 Medium-Carbon Industrial Hardened Steel
- Surface Finishing Treatment: Low-Reflective Chemical-Resistant Matte Black Surface Armor
- Folding Direction Alignment: Right-Hand Swing (Folds toward the right side ejection interface profile)
- Product Net Component Weight: ~9.40 oz (~0.59 lbs) Ultra-Strong Compact Frame Mass
- Total Packaging Shipping Mass: ~1.01 lbs (Enclosed Inside Heavy Protection Staging Boxing)
- UPC Barcode Number: 811313033384
