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The SIG Sauer 200 STR has an 11 mm dovetail on the receiver for mounting a diopter rear sight or a scope sight, either directly or via a Picatinny rail adapter. Dovetails come in several different types and sizes depending on manufacturer, but the most common are the 11 mm and 3 ⁄ 8 inch (9.5 mm).
NATO Accessory Rail (STANAG 4694) The NATO Accessory Rail (NAR), defined by NATO Standardization Agreement (STANAG) 4694, is a rail interface system standard for mounting accessory equipment such as telescopic sights, tactical lights, laser aiming modules, night vision devices, reflex sights, foregrips, bipods and bayonets to small arms such as rifles and pistols.
Many reflex sights (e.g. red dot sights) and holographic sights have proprietary mounts. [23] Aimpoint Acro rail: A dovetail rail for attaching a sight via a clamping mechanism, and with a 4 mm [24] wide straight recoil lug groove. The dovetail is approximately 16.5 mm wide, and is radiused so as not to have any sharp edges.
Launched in 2019 together with the sights Aimpoint Acro P-1 and C-1. [16] The Acro rail is a dovetail rail for attaching a sight via a clamping mechanism, and with a 4 mm [17] wide straight recoil lug groove. The mount is compact enough to be used on pistols, as well as rifles and shotguns. The dovetail is approximately 16.5 mm wide, and is ...
In this configuration the rifle is capable of first shot hits with a cold, warm or fouled barrel. Tests with 10.89 g (168 gr) ammunition provided sub 0.5 MOA ten-shot groups at 91 m (100 yd). The rifle was supplied with a telescopic sight, bipod, five magazines, sling, cleaning kit and tool roll, encased in a fitted transport case. [5]
It is similar in concept to the earlier commercial Weaver rail mount used to mount telescopic sights, but is taller and has wider slots at regular intervals along the entire length. The MIL-STD-1913 locking slot width is 0.206 in (5.23 mm). The spacing of slot centres is 0.394 in (10.01 mm) and the slot depth is 0.118 in (3.00 mm). [8]
Many rail-grabber-mounted accessories can be used on either type of rail, and accessories designed for a Weaver system will always (SWP) fit Picatinny rails – although not vice versa because the Picatinny locking slot width is 0.206 in (5.232 mm) vs the .180 width of the Weaver, and the spacing of slot centers is 0.394 in (10.008 mm). [5]
Front globe of a BRNO target sight. Note knurled nut holding in the replaceable front sight insert. A globe sight is a front sight component used to assist the aiming of a gun/device, usually those intended to launch projectiles, such as firearms, airguns, and crossbows. It is found in particular as a front sight element on rifles.