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Initial sales of the Colt AR-15 were slow, primarily due to its fixed sights and carry handle that made scopes difficult to mount and awkward to use. [84] Military development of compact military AR-15 carbines encouraged production of a 16-inch (41 cm) barreled civilian SP1 carbine with a collapsible buttstock beginning in 1977.
AR-15 Sporter (SP1; Bundled with 3× scope) A1 Triangular S-1 A1 No No .223 REM 20 in. A1 1:12 Yes A1 R6003 AR-15 Sporter Carbine (SP1 Carbine; Bundled with 3× scope) 2nd Generation Short Ribbed S-1 A1 No No .223 REM 16 in. A1 1:12 Yes A1 R6004 AR-15 Sporter (SP1; Bundled with Colt Reflex Sighting System) A1 Triangular S-1 A1 No No .223 REM
The scope base is the attachment interface on the rifle's receiver, onto which the scope rings or scope mount are fixed. Early telescopic sights almost all have the rings that are fastened directly into tapped screw holes on the receiver, hence having no additional scope base other than the receiver top itself.
The AR-15 uses an L-type flip, aperture rear sight and it is adjustable with two settings, 0 to 300 meters and 300 to 400 meters. [16] The front sight is a post adjustable for elevation. The rear sight can be adjusted for windage. The sights can be adjusted with a bullet tip or pointed tool. The AR-15 can also mount a scope on the carrying handle.
Civilian AR-15 target sights have an aperture between 1 and 1.15 mm (0.039 and 0.045 in). The aperture on AR-15 military sights have a day aperture of approximately 1.78 mm (0.070 in), and the M16A2 also a night setting with a larger 5.08 mm (0.200 in), and as such the military sight is not strictly a diopter sight in either setting.
The first ACOG model, known as the TA01, was released in 1987. [3] [4] An example was tested on the Stoner 93 in the early 1990s by the Royal Thai Armed Forces. [5]In 1995, United States Special Operations Command selected the 4×32 TA01 as the official scope for the M4 carbine and purchased 12,000 units from Trijicon. [6]
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[13] [14] [15] Georgia. Galatz is standard-issue marksman rifle of Georgian Armed Forces, thought some reserve and second line units still use SVD. Some Georgian Special Army and Police units use VSS Vintorez, TAR-21, AR-10 and M4A1 configured as marksman rifles Hungary. The SVD is the main designated marksman rifle for the Hungarian Armed ...