Sightron 4-20×50 S-TAC Zero Stop FFP Riflescope (MOA-3 Reticle)

Description

During freezing dawn PRS match stages the Sightron 4-20×50 S-TAC Riflescope equipped with the MOA-3 reticle and zero stop mechanics delivers repeatable elevation tracking. Configured with a 30mm tube, 1/4 MOA clicks, and 80 MOA elevation travel, this first focal plane optic provides true MOA subtensions. Ballistic holds stay true through all zoom levels, though the reticle lines appear thin at 4x zoom.

Milled from single-piece 6061-T6 structural aluminum, the heavy 30mm monotube prevents flex under heavy recoil cycles. Fully multi-coated Japanese glass lenses provide high light transmission with edge-to-edge optical resolution. Measuring 15.0 inches and weighing 25.4 ounces, this Sightron precision scope features nitrogen gas purging that meets rigorous waterproof immersion standards.

Key Features of Sightron 4-20×50 MOA-3

Precision shooters buy Sightron 4-20×50 S-TAC riflescope packages to eliminate magnification holdover errors during tactical match courses. The exposed zero stop elevation turret prevents lost zero settings after dialing long-range trajectories.

• 30mm aircraft aluminum monotube delivers 80 MOA internal adjustment range
• 4-20x magnification range transitions smoothly from close stages out to distance
• 50mm objective lens generates high optical clarity and maintains low rifle clearance
• 1/4 MOA exposed tactical turrets provide positive audible click detents on each movement
• 4-20×50 S-TAC MOA-3 reticle allows rapid bullet drop compensation and wind holds
• First focal plane etched glass ensures valid measurements across all magnifications
• Side-focus parallax knob dials parallax out from 10 yards to infinity
• Zero stop elevation turret returns to mechanical zero without visual reference

Internal Erector Architecture

Built with patented ExacTrack erector springs, the internal erector cell retains zero repeatability within 1 percent across the 80 MOA elevation range. Designed to withstand 1000G recoil forces, this Sightron scope handles continuous .300 Win Mag strings without reticle movement. The erector cell maintains precise zero settings between -20°F and 140°F, preventing tracking deviations during harsh winter matches.

Receiver Fitment Parameters

With 5.8 inches of ring mounting space, this optic mounts onto tactical chassis rails without clearance issues. Torque 30mm ring cap screws to 16 in-lbs, and tighten rail cross-bolts to 42 in-lbs. The 3.8-inch eye relief protects shooters against heavy recoil movement, while the 50mm objective bell fits medium mounting rings over heavy barrel contours.

Field Match Dynamics

The magnification ring turns with firm 10 in-lbs torque to maintain set power levels when moving through barricade ports, assisted by a pop-up throw fin. This optical unit is not designed for dedicated 1000-yard benchrest matches where 30x+ magnification is required, nor for CQB room clearing.

• Clean objective elements using lens-cleaning pens and canned air every 200 rounds
• Check 30mm ring screw torque using a precision inch-pound driver every 500 rounds
• Clean zero-stop threads and inspect turret rubber O-rings every 12 months

Sightron Warranty Manifest

Sightron backs this tactical optic with a full lifetime warranty covering optical elements, chassis integrity, and internal seals. The complete factory package includes the riflescope, flip-up lens covers, zero stop hex wrench, lens cleaning cloth, and quality inspection test documents.