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Military prism sights featuring BDC reticles (e.g. the ACOG) or elevation turrets with range markings (e.g. PSO-1) are fairly common, though commercial manufacturers also offer the option to install a BDC reticle or elevation turret as long as the customer supplies the necessary ballistic data. [29]
The PSO-1 elevation turret features bullet drop compensation (BDC) in 50 metres (55 yd) or 100 metres (109 yd) increments for engaging point and area targets at ranges from 100 metres (109 yd) up to 1,000 metres (1,094 yd). At longer distances the shooter must use the chevrons that would shift the trajectory by 100 metres (109 yd) per each chevron.
Some of the models are however also available with MOA/MOA configuration or second focal plane (SFP) reticles. IOR Tactical 4x24 IL; IOR Tactical 1/6x30 PitBull IL; IOR 1.5-8x26 Trident IL; IOR Tactical 1/4x32 PitBull IL [1] IOR Tactical 2.5-10x42 IL; IOR Tactical 2-12x36 SF (.308 BDC reticle) [2] IOR Tactical 6-24x56 IL [3] IOR Tactical 6-24X50 IL
ACOG reticles are illuminated at night by an internal tritium phosphor. Some versions have an additional daytime reticle illumination via a passive external fiberoptic light pipe or are LED-illuminated using a dry battery. The first ACOG model, known as the TA01, was released in 1987. [2] Down-range ACOG sight picture
Reticle of Bell & Howell Pocket Comparator Reticle accessory (PD-8) used in sniper rifles A reticle , or reticule [ 1 ] [ 2 ] also known as a graticule , is a pattern of fine lines or markings built into the eyepiece of an optical device such as a telescopic sight , spotting scope , theodolite , optical microscope or the screen of an ...
The M145 Machine Gun Optic is a variant of the C79, which is different to the standard version in that ballistic compensation is in the reticle rather than in the mount. Reticle illumination is by a battery-powered LED with eleven brightness settings. It is used by the US military for its M249s and M240s.
Besides the BDC elevation or vertical adjustment control of the reticle, the windage or horizontal adjustment control of the reticle can also be easily dialed in by the user without having to remove turret caps etc. The reticle illumination of the ZRAK M76 4× 5°10′ is provided by (radioactive) tritium.
The BDC feature must be tuned at the factory for the particular ballistic trajectory of a particular combination of rifle and cartridge at a predefined air density. Besides the BDC elevation or vertical adjustment control of the reticle, the windage or horizontal adjustment control of the reticle can also be dialed in by the user without having ...