JRail Picatinny Rail 20 MOA

Picatinny Rail Mark V Manum (Jrail) and PEAK 44 Picatinny Rail (JRail): engineered for performance

The Picatinny Rail Mark V Manum (Jrail) and the PEAK 44 Picatinny Rail (JRail) feature an innovative rear cutout designed to ensure optimal scope placement for hunters and shooters who demand the most from their firearms. The rear cutout accommodates low rings while preserving proper eye relief and allows the use of scopes with large ocular bells and magnification rings without interference. This design supports repeatable and stable optic alignment critical for accurate long-range shooting.

Manufactured from aerospace-grade aluminum, these rails provide a high strength-to-weight ratio that benefits both field carry and precision shooting. The JRail fits Picatinny/Weaver-style rings, ensuring broad compatibility with common ring types and bases. Note that the rail is only available in 20 MOA, a slope that eases elevation correction for extended-range applications without resorting to additional tilt devices.

For hunters seeking a lightweight yet durable mounting platform, the JRail's combination of materials and geometry improves overall balance and reduces added mass on the receiver. The rear cutout specifically addresses common clearance challenges with bolt-action rifles, minimizing contact between large eyepieces and the bolt handle or receiver during cycling. This reduces the need for higher rings and helps maintain a comfortable, consistent cheek weld.

Installation-ready details are part of the package: the kit includes the necessary Torx bit and hardware, along with torque guidance to reduce installation errors. When fitting the JRail on platforms such as Remington 700, Howa 1500, Weatherby Mark V, Weatherby Vanguard, or Weatherby Model 307, follow the specific screw sizes for a secure and precision-preserving installation.

Features & specifications

The technical data underline the JRail's practical orientation: minimal weight with reliable clamping. Weighing 2 oz with screws, the rail adds negligible mass to the rifle while providing the stiffness needed to retain zero under recoil and repeated use. Aerospace aluminum construction resists deformation under stress and vibration, preserving optic alignment over time.

The rear cutout not only enables low ring use but also eases ocular clearance for scopes with large bells and adjustable magnification rings. This results in fewer fitment issues during mounting and a smoother shooting experience, especially for shooters who frequently change optics or rings between rifles. Compatibility with Picatinny/Weaver rings simplifies swaps across different setups.

Regarding installation and upkeep, the manufacturer's recommended torque is specified to avoid loose fittings and to prevent over-torquing that could harm receiver threads or the rail itself. Adhering to the 20 in/lbs specification will secure the rail while protecting thread integrity and structural components.

• Weight: 2 oz. (with screws)
• Torque specs: 20 in/lbs
• #8-40 screws (Weatherby Model 307)
• #6-48 screws (Remington 700, Howa 1500, Weatherby Mark V & Weatherby Vanguard)
• Torx bit included
• 20 MOA only
• Compatible with Picatinny/Weaver style rings
• Material: aerospace aluminum

When installing the JRail, use a calibrated torque driver and tighten in a cross pattern, increasing torque gradually until each screw reaches the specified 20 in/lbs. Confirm scope alignment and ocular clearance before final torque. For low-ring installations and large ocular housings, check bolt and magazine clearance throughout the bolt cycle.

Practical tips: apply a light anti-seize or a low-strength thread locker if frequent reassembly is expected, keep a record of final torque settings, and perform a function and fit check before heading into the field. These simple steps conserve the rail's condition and maintain the rifle's point of impact over time.