The PRO sight contains a QRP2 mount and a standard AR15 spacer which can be removed. It is also equipped with flip covers, a black front flip cover and a transparent rear flip cover that allows the user to engage a target with both lens covers closed in an emergency situation.UNIQUE FEATURESAlways ready – always on. Turn it on for up to 3 years using one single battery. No need to fumble with switches prior to use.•2 minute of angle red dot for accurate target engagement at all distances.• In service date and battery change date reminders makes inventory tracking and maintenance easy.•Enhanced speed on target and increased first shot hit probability when compared to iron sights and magnified scopes.•Compatible with all generations of night vision devices and may be used with Aimpoint 3X Magnifier and Concealed Engagement unit.•Hard anodized aluminum alloy housing. Rugged enough for real world conditions and waterproof to 150 feet.•Threaded front lens opening allows use of screw-in antireflection device (ARD).•Front and rear flip covers • keep lenses clean. Transparent rear flip cover allows use of the sight (with botheyes open) even with both covers closed in an emergency.•Battery and adjustment cap retainer straps means you will never lose your pieces.•Modular mount set up for use on flat-top AR15, M4 Carbine and M16 rifles. (Adapter available for carry handle mounting)• Removable spacer. Remove for use on shotguns and sub-guns. QRP2 rail grabber mount. Snap knob three times for a perfect mount. Will not deform your rail like many other mounts.•Recessed lens openings helps prevent against impact damage, fingerprints and scratches. Optical SpecificationsOperating principle: Reflex Collimator sight with LEDOptical magnification: 1xAiming dot size: 2 MOADot intensity: Visible against a background luminance of 0,1 to 55 000 lxOptical signature: No optical signature is visible at 10 meter distance, front side, on appropriate settings with NVD 3Dot color: Peak Wavelength: 650 ± 10 nmNVD compatible: YesOptical coating: Anti-reflex, all surfaces and multi-layer. NVD-Compatible 1, 2, 3Clear aperture: 26 mmEye relief: Unlimited Power SourceBattery type: 3V lithium battery, type 2L76 or DL1/3N.Battery life – Day time use: 30 000 h continuous (pos. 7 of 10)Power intensity: 4 NVD and 6 Daylight, of which 1 extra bright Physical SpecificationsLength sight only: 115 mm (4 1/2″)Length conf: 130 mm (5 1/8″)Width: 55 mm (2 3/16″)Height sight only: 55 mm (2 3/16″)Height conf: 67 mm (2 5/8″)Weight sight only (incl battery): 220 g (7,8 oz)Weight conf: 330 g (11,6 oz) incl. Lens Covers, Mount, and SpacerHousing material: High Strength AluminumHousing finish and color: Matte blackMaterial mount and spacer std conf: High Strength AluminumSurface treatment: Hard anodized, matteHeight of optical axis – sight and mount: 30 mm (1 3/16″) over top surface of Picatinny/Weaver RailHeight of optical axis – sight, mount and Micro spacer XX: 39 mm (1 9/16″) over top surface of Picatinny/Weaver RailAdjustment: Range ±1 m at 100 meters (±1 yds at 100 yds) in windage and elevation, 1 click = 13 mm at 100 meters = 10 mm at 80 meters = 7/16″ at 100 yds Environmental SpecificationsTemperature range operation: -45°C to 71°C (-49°F to 160°F)Temperature range storage: -51°C to 71°C (-60°F to 160°F)Temperature shock: Operable after a temperature shock between -45°C and +71°C. Duration: 4h of Hot +71°C, 4h of Cold -45°C. Cycling: 3 timesHumidity: Operates despite humidity. Limits: RH: 95%, Temp: 20ºC to 50 ºC, cyclicImmersion, static: Operates after immersion until temperature is stabilized + 10°C compared to the water. Limits: Depth: 45 m (150 ft.)Shock: Operable before and after shock. Limits: X-axis: 500 g, 0.7 – 1.1 ms (3 shocks), Y-axis: 40g ±4g, 11 ±1ms (2 shocks in each direction, Z-axis: 40g ±4g, 11 ±1ms, 2 shocks in each direction. Functional during exposure (room temperature)Vibration: Operates despite vibration. Limits: Vibration, sinusoidal in a frequency range of 10-150 Hz. Frequency: 10-30 Hz, ±1.587 mm, Frequency: 30-150 Hz. 5.75 g, 1 octave/minChemical resistance: Withstands occasional contamination of: Hydraulic oil (FSD 8407, Tryckolja 021), Lubricating oil (FSD 8127, Motorolja 5W/30), Lubricating oil (FSD 8220, Smörjfett 220), Lubricating oil (Break Free), Fuels (FSD 8612, Diesel fuel oil), Solvents/cleaning (FSD