Holosun 509 Low Profile Picatinny Mount - 0.82" Optical Centerline Height - Fits 1913 Picatinny Rails - Native 509T Footprint Interface, Anodized Black Finish - 509MNT-0.82-PIC
Product Description
If you are staging an enclosed reflex sight like the Holosun 509T onto a tactical shotgun, a sub-machine gun, or a specialized rifle chassis, utilizing a standard AR-15 high-rise absolute co-witness riser can raise your line of sight too high. A high optic mount forces an awkward, floating chin weld that ruins your recoil tracking loop on your armorer bench. The **Holosun® 509 Low Profile Picatinny Mount (509MNT-0.82-PIC)** is custom-engineered to eliminate this mechanical hurdle. It acts as a rugged, low-profile anchor to mount your enclosed red dot as close to the receiver rail as possible.
Precision CNC-machined from a premium block of structural aluminum alloy and finished with a durable, non-reflective matte black anodized coat, this compact base clamp is optimized to handle harsh 12-gauge or rifle recoil impulses. The top section features Holosun’s native **509 enclosed clamping rail blueprint**, featuring a rock-solid cross-bolt lug system that slots into the internal tracks of the optic housing. The base features a standardized **1913 Picatinny cross-bar mount** that bites firmly into your receiver rail paths, eliminating downrange zero-shifting under heavy environmental vibrations.
By positioning the optic at a sleek **0.82-inch centerline height**, this low-profile mounting footprint provides an ideal cheek weld for traditional stocks, helping you track your reticle instantly off your workspace bench.
*Armorer Bench Notes & Real-World Staging Guidance: The Holosun 509MNT-0.82-PIC mount assembly arrives complete with its factory high-tensile steel cross-bolt fasteners, dedicated Torx mounting tools, and thread-locking compound indicators organized inside its original packaging. PROPRIETARY CO-DEPENDENT OPTIC FOOTPRINT MATRIX: The upper interface layout of this base is engineered natively and strictly to match the **Holosun 509 standard footprint (commonly found on the 509T and 509-RD series)**. It uses a specialized side-clamping bar system to lock the optic into place. It will not mount or adapt standard open reflex sights like the Holosun 407C/507C (RMR footprint) or 407K/507K (Shield footprint) due to separate base rail dimensions. Armorer Workbench Mounting Sequence: 1. Ensure your weapon platform is fully unloaded, magazine removed, and visually verified safe. 2. Loosen the side clamping bar screw on the 509 mount and seat the base square within your receiver's 1913 Picatinny rail slots. 3. Push the mount slightly forward toward the muzzle to seat the recoil cross-bar against the rail wall before tightening. 4. Slide your Holosun 509 optic body horizontally over the top clamping rail. 5. Tighten down the optic’s side clamping screw until it pinches the mount rail rigidly. Torque Parameter Guidelines: When securing the steel base mount onto your Picatinny rail, torque the main rail cross-bolt screw to exactly **25 to 30 in-lbs**. For the small optic-to-clamp side screw, do not exceed **15 in-lbs**. Apply a single micro-drop of medium blue threadlocker to the thread rows to freeze the fasteners against intensive heavy-caliber recoil cycles downrange.*
Key Features
- Ultra-Low 0.82" Centerline Height: Drops your enclosed reflex sight down close to the receiver, giving you a natural cheek weld on shotguns and compact carbines.
- Native Holosun 509 Rail Interface: Custom-contoured with the specialized side-clamping rails built for the Holosun 509T and 509 series enclosed sights.
- Standard 1913 Picatinny Clamping Base: Clamps securely onto any mil-spec vertical 1913 Picatinny rail or Weaver-style base plate layout on your bench.
- Rigid Machined Aluminum Billet: Precision CNC-cut from high-strength structural aluminum to absorb heavy shotgun and large-rifle impact shocks.
- Solid-State Recoil Cross-Bar Lug: Outfitted with a steel cross-bolt that fills the rail channel completely, flatlining downrange zero-shifting.
- Anodized Matte Black Finish: Treated with a non-reflective hardcoat anodized jacket that shields the base from field scuffs and harsh bore solvents.
Product Specifications
- Brand: Holosun® Technologies (Walnut, California)
- Model Line: Optics Performance Mounts & Low-Profile Rail Base Adapters Series
- MPN/SKU: 509MNT-0.82-PIC (Also cataloged as 509MNT-PIC)
- UPC Code Profile: 810047071075
- Optic Interface Footprint: Native Holosun® 509 / 509T Enclosed Clamping Rail Standard
- Weapon Mounting Standard: Mil-Spec 1913 Picatinny Rail Interface Base
- Optical Centerline Height: 0.82 Inches (~20.8 mm Low Profile Mount Specification)
- Chassis Body Material: Precision CNC-Machined High-Tensile Structural Aluminum Billet
- Cross-Bolt Clamping Hardware: High-Grade Hardened Alloy Steel Fasteners
- Exterior Finish Dressing: Non-Reflective Hardcoat Anodized Satin Matte Black Finish
- Recoil Lug Architecture: Integrated Mechanical Cross-Slot Recoil Indexing Bar
- Compatible Reflex Sights: Holosun® HE509T-RD, HE509T-GR, Optic Systems in 509 Outline Class
- Full Kit Component Checklist: 0.82" Low Picatinny Mount Module, Steel Clamping Fastener Pack, Torx Mounting Keys, Factory Index Reference Insert
- Packaging Format Class: Factory Retail Poly Bag Pack with Holosun Branded Header Presentation Card
- Product Type Category: Firearm Components / Weapon Optics Mounts, Risers & Bases
- Overall Base Width Profile: Compact Streamlined Low-Impact Mount Silhouette
- Net Component Module Mass: ~0.95 Ounces (Featherweight Heavy-Duty Solid-State Alloy Core)
- Country of Manufacture: Sourced and Fabricated to Exacting Performance Quality Guidelines
- Warranty Tracking Protection: Fully Backed by Holosun Factory Parts Materials Guarantee
