Primary Arms by Holosun - Kolimator HS503-G - ACSS CQB

The Holosun HS503-G ACSS CQB is a compact collimator sight with a closed design, specifically designed for use on long guns, including AR15 carbines and semi-automatic rifles. The body of the sight is made of 6061-T6 aluminum, using precision milling for light weight and strength. The weight of the sight with high mount is only 138 g.

Thanks to the motion sensor, the Holosun HS503-G ACSS CQB achieves an impressive service life of up to 50,000 hours. The unit automatically turns off the LED when there is no movement activity, going into sleep mode. Simply moving the weapon is enough to re-activate the aiming mark. The battery is mounted on the side, under a nut on the right side of the body. This design makes it possible to replace the battery without removing the collimator from the weapon.

The sight uses lenses covered with multi-layer anti-reflective coatings, which provide a clear and sharp image and high light transmission. The device is equipped with a control system and diode resistant to shock (1000 G) and weather conditions, which guarantees stable operation on any weapon.

The ACSS CQB sighting reticle's chevron, dot scale and horseshoe-shaped ring allows for effective fire at both short and longer ranges (up to 600 yards) using a range of popular calibers such as:

• 5.56 NATO
• 5.45x39
• 300 BLK
• 7.62x39
• 12 ga Slug
• 7.62x54R
• 7.62 NATO / .308 Win
• .22LR
• 9mm

The Holosun HS503-G ACSS CQB comes with a high mount (1/3 co-witness) dedicated mainly to carbines, and a low mount recommended for shotguns and rifles of the AK family, which allows you to achieve the optimal sight height over the barrel.

Features:

• Parallax-free optical system with unlimited distance from the eye.
• Streamlined design with very little restriction to the field of observation
• Advanced LED technology with low power consumption for up to 50,000 hours of operation on a single CR2032 battery.
• Durable lenses with advanced multi-layer coatings for full spectrum light transmission and high clarity.
• Eye-safe LED backlighting.
• Motion sensor that awakens the device from sleep mode (which it enters 10 minutes after the last activity (last movement)).
• A function to remember the last used brightness level of the aiming point.
• The adjustment turrets have been partially built into the body and secured with metal nuts, so they are well protected against weather and mechanical damage.
• Made using CNC technology, the durable, shock-resistant T6061-T6 aluminum construction.
• Water-resistant housing that meets the IP67 standard.
• Two mounts included: 1/3 Co-Witness (mounted) and low.
• Fits Picatinny or Weaver rails.
• Battery mounted on the side of the case in a screw-down compartment.

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