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Rugged flip-up sights provide instant backup when primary sight fails or weather conditions limit its use. Robust cross-bolt with oversized, slotted hex nut locks clamping block tightly to Picatinny accessory rail for zero sight movement. Clean, low profile design won’t snag on other gear when folded down. All models regulate with mil-spec A2 carbine sights or same-height aftermarket sights—perfect for co-witnessing with non-magnifying red dot and holographic optical sights. Precision machined from hardcoat anodized 6061 T6 aluminum and heat-treated 4140 steel for repeatable settings and the strength to handle the rigors of combat. A2 windage knob on rear sights provides precise ½ MOA adjustment. Standard Rear - Versatile, .108" diameter aperture gives an excellent field of view for both short- and long-range targets. Deep grooves on the sides ensure positive grip for quick deployment, while ball detent lock resists accidental folding down during strenuous maneuvers. Tritium Rear Sight – Adds to the Standard rear sight, self-illuminating, Trijicon® Tritium inserts on each side of the aperture that glow in low light to help you quickly align the aperture with a tritium front sight post in all light conditions. 360 Series Rear - HK-style rotating turret for maximum accuracy out to 300 yards. Knurled turret collar with machine engraved range index marks allow quick aperture changes; two ball detents lock turret in place at each position. Close-range .160" aperture provides a large field of view for close combat; three .070" apertures are trajectory calibrated for the mil-spec M4 at 100, 200, and 300 yard ranges. (Best accuracy with 5.56mm (.223) ammunition that duplicates the military M855 62 grain FMJ load.) Front Sight clamps to gas block accessory rail (NOT for same-plane applications). A2-style .070" wide adjustable post is correct height for both rear sight models. Thick, protective ears guard sight post from bending or breakage.
SPECS: 6061 T6 aluminum and 4140 steel, matte black. Standard Rear & Tritium Rear Sight - 1-3⁄8" (3.5cm) overall length, 1-7⁄8" (4.8cm) high (extended), 7⁄8" (2.2cm) high (folded). 360 Series Rear - 1-3⁄8" overall length, 1-7⁄8" high (extended), 13⁄16" (3cm) high (folded). Trajectory calibrated for carbines with 16" long barrel equipped with A2 front sight or sights of equivalent height. Front - 7⁄8” (2.2cm) long, 1” (2.5cm) wide, 1.650” (4.2cm) high (extended), ¾” (1.9cm) high (folded).
Contrasting red front and green rear, fiber optic dots offer quick sight alignment; won’t wash out in bright light, improve contrast in low light. Fully adjustable, “U”-notch, rear sight gives precise alignment for long range shots. Replaces factory sights with only minor fitting. Machined from aircraft aluminum for years of service.
Steel sight sets feature tritium front sight for quick pickup in full light, half light, and low light.HK 91 sight sets have either Big Dot or Standard Dot front sights and windage and elevation adjustable rear sights.
SPECS: Steel, matte black. Tritium insert on front sights.
Tritium sight set provides excellent sight visibility in all light conditions. Front post is .100" wide and features a green, tritium vial for low-light operations. Easy-to-see, white outline reflects ambient light for day missions. Rear sight features two, flip-style apertures (.100" and .225" I.D.) for long-range and close-quarter engagement. Close-range aperture features two, subdued, tritium dots at 3 o’clock and 9 o’clock for proper alignment with the front sight post in low-light conditions. Same-plane design eliminates elevation differences between small and large apertures. Rear sight aperture can be chosen for the lighting situation as well as the range of target.
The Bobro Engineering LowRider sights are designed from the start to be an extremely low profile set of BUIS for a specific purpose. Many Short Barreled Rifle owners have run into an issue with figuring out how to mount a set of BUIS on the upper and still fit their needed Lights, Lasers and Optics. The idea was to make it so that the Rear Sight was so low profile that there was almost no possible way it could interfere with optics and the Front Sight could easily be mounted under the front arm of the optic mount. This keeps them out of the way, but can still be used in the even the primary optic has a failure.
Even though these sights were designed to fill a specific need, they can still be used on a full size rifle in traditional BUIS positions as shown below. The LowRider sights still maintain all of the adjustability of a standard set of BUIS such as Windage and Elevation and lock in place when flipped up. Just press the button on the side to release them and they lay flat.
Easy-to-see post front and ghost-ring rear get you on target fast for brush hunting and action shooting. All steel construction, front/rear sets provide the correct front sight for each model, eliminating the guess work of choosing sights. Easy-to-install, fully machined to fit existing rear scope base and front sight holes/dovetails. Windage and elevation adjustable with dual set screws. Modified post front sight with vertical white line insert provides excellent target contrast, is quick to pick up in all light conditions.
SPECS: Rear – Steel, blue, matte finish. Marlin 39A. Front - Steel, blue, matte finish. Fits .250" or .340" wide front bases or nominal 3⁄8" dovetail, as noted.