RS Regulate AK-300 Modular Side Mount - Full-Length Lower Rail, Yugo/Serbian Pattern AK Interface, 6061-T6 Aluminum, Matte Black - AK-307MS
Product Description
Equipping a Yugo or Serbian pattern AK rifle with professional optics traditionally forced marksmen to accept awkward compromises. Legacy over-the-bore cover mounts often sit too high, loose, or out of line with the barrel, while typical Eastern European side-rail setups prevent you from centering the optic over the receiver. The **RS Regulate® AK-307MS Yugo Full-Length Lower Modular Side Mount (AK-307MS)** completely flatlines this alignment bottleneck, providing the global standard in two-piece adjustable AK targeting architecture.
Proudly engineered and precision CNC-machined from a unibody block of **6061-T6 structural aerospace aluminum alloy**, this rugged lower module is configured specifically to clamp onto the unique side plates of Yugo and Serbian rifles. By pioneering a modular two-piece system, the AK-307MS lower section allows you to shift the upper optic mount (sold separately) both forward-and-back and side-to-side. This ensures your red dot or variable scope sits perfectly low and centered directly over the rifle's bore axis. The base utilizes a low-profile, titanium-oversized **locking cam system** that bites down aggressively on your receiver's rail layout to handle heavy 7.62x39mm or 7.62x54r recoil shockwaves, while maintaining a true return-to-zero hold between removal cycles.
Finished in a resilient, non-reflective Type III hardcoat anodized jacket and arriving with all necessary micro alignment hardware, this turn-key platform upgrade provides absolute targeting efficiency on your workbench.
*Armorer Bench Notes & Real-World System Staging Guidance: The RS Regulate AK-307MS lower receiver adapter arrives complete with the pre-assembled titanium locking lever cam assembly, the modular upper tracking rail channel, 4x micro optic retention screws, and a dedicated alignment Allen key. JURISDICTIONAL SERBIAN & YUGO FITMENT MATRIX: This specialized side mount is engineered natively, strictly, and exclusively to slide onto **Yugo/Serbian pattern AK receiver side rail plates**. *Co-Dependent Model Match:* It perfectly anchors onto the **Zastava® Arms M70, M90, M77, M59/66, and corresponding PAP series tactical variants** on your bench. System Upper Compatibility Note: This is a lower mount component only; it requires an **RS Regulate AKR Picatinny top deck or model-specific upper ring modules (like the AKMD, AKML, or AKM)** to seat your targeting optic. Incompatibility Warning: This Yugo-specific architecture **will not fit standard Russian, Bulgarian, or Romanian pattern AKM receivers** due to differing side plate rivet spacing. Armorer Workbench Staging Sequence: 1. Visually and physically confirm your host firearm is completely clear of live ammunition, the magazine is removed, and the chamber is safe. 2. Swing the lower QD cam lever forward into its fully open position. 3. Align the mount's internal guide rails over the rear entry track of your receiver's side plate, sliding the unit forward until it meets the travel stop pin. 4. Flip the locking lever rearward 180 degrees to clamp it flush against the body housing. 5. *Tension Tuning Step:* If the lever feels loose or encounters early resistance, look at the base where the spring-loaded lock plate sits. Press the plate down and turn the cross-bolt nut clockwise to tighten its bite, or counter-clockwise to loosen it, until the lever locks shut with smooth, firm hand pressure downrange.*
Key Features
- Yugo-Pattern Axis Calibration: Built specifically to interface with Yugo/Serbian pattern side plates, ensuring accurate height alignment and clearance over Yugo-specific top covers.
- Patented 2-Piece Axial Adjustment: Allows you to shift the upper optic mount left-to-right and front-to-back to center your targeting optics perfectly over the rifle's bore axis.
- Ultra Low-Profile Profile: Positions your optic deck as low as physically possible over the receiver cover, letting you maintain a natural cheek weld and co-witness with iron sights.
- Titanium-Reinforced Locking Cam: Utilizes an adjustable, high-tensile titanium locking lever cam that clamps down tight on the rail, holding a true return-to-zero between field-strips.
- Premium 6061-T6 Aluminum Billet: Multi-axis CNC-machined from a solid block of high-strength aerospace aluminum to ensure rigid structural integrity without adding unnecessary bulk.
- Type III Hardcoat Anodized Shield: Finished with a deep, scratch-resistant matte black anodizing that easily shrugs off intense barrel heat, trail dirt, and harsh gun solvents.
Product Specifications
- Brand: RS Regulate® (Las Vegas, Nevada)
- Model Line: AK-300 Precision Architecture Modular Side Mount Systems
- MPN/SKU Code: AK-307MS (Full-Length Yugo Lower Rail Base SKU)
- UPC Code Profile: 617395300150
- Rifle Side Rail Fitment Match: Yugoslavian / Serbian AK Side Rail Mounting Plates Only
- Pistol/Rifle Family Tracking: Zastava Arms M70, M90, M77, PAP Series Semi-Auto Rifles
- Optic Interface Style: RS Regulate Proprietary Modular Upper Tracking Rail Array
- Mount Configuration Class: Full-Length Lower Optic Riser Adapter (Dual Guide Tracks)
- Mount Component Structural Material: Premium Multi-Axis CNC-Machined Heavy-Duty 6061-T6 Aircraft Grade Aluminum Billet
- Lever Tension Hardware Core: High-Strength Heat-Treated Hardened Titanium Alloy Cross-Bolt Assembly
- Exterior Finish Dressing: Mil-Spec Type III Hardcoat Anodized Non-Reflective Matte Black Shell
- Full Kit Component Checklist: Completed AK-307MS Lower Mount, micro screws, assembly hex wrench
- Packaging Format Class: Factory Retail Sealed Transparent Blister Clamshell Packaging with Technical Target Backing Cards
- Product Type Category: Rifle Components / AK Optic Mounts & Side Rail Riser Plates
- Overall Base Body Length: ~5.85 Inches (~148.5 mm Linear Chassis Profile Footprint)
- Net Component Module Mass: ~2.96 Ounces (~84.0 Grams Ultra-Lightweight Balanced Structural Frame Mass)
- Country of Engineered Origin: Developed, Sourced, Machined, and Rigorously Torture-Tested in the USA
- Warranty Tracking Protection: Fully Backed by RS Regulate Factory Lifetime Structural Warranty Coverage
