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The rifle is intended to be utilized primarily with optics. The standard day optic used on the QBU-88 for military use is a Chinese 3-9×40 scope with an integral quick-release mount. [4] In 2008, a new Chinese 6-24×44 tactical scope became available for counter-terrorism and other law enforcement use. [citation needed]
Among scopes for rail mounts, the 22.5-degree V-shaped Zeiss rail is the most prevalent standard. It was introduced in 1990. After the patent expired in 2008, compatible scopes have been offered from manufacturers such as Blaser, [1] Leica, Minox, Meopta, Nikon, [2] Noblex (formerly Docter [3]), Schmidt & Bender [4] and Steiner. [5]
Aimpoint ECOS-N (Enhanced Combat Optical Sight-Navy), a variant of the CompM2 using the Wilcox Aimpoint CompM mount instead of the standard issue QRP mount; Tactical Ordnance and Equipment Improved Combat Sling, which allows for secure cross body/patrol carry. Precision Reflex, Inc. (PRI) M69 Bracket Mount for the AN/PVS-14 night vision device.
The scope mounting system consists of a centering hole located on the front face of the rear sight assembly and a dovetail-like mounting point at the front end of the receiver. Swiss Arms (respectively Brügger & Thomet) offer several types of quick-release scope mounts and Picatinny rails. A version of the rifle with an integral receiver ...
The SPR/A and SPR/B both used the KAC M4 Match FF RAS, KAC part number 99167. Two ARMS #22 Throwlever 30 mm steel rings are used to mount the dayscope. The SPR/A, SPR/B, and Mk 12 MOD 1 use ARMS #22 high rings, while due to the increased height from the SWAN Sleeve, the SPR and Mk 12 MOD 0/H use ARMS #22 medium rings.
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.
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]
The M25 sniper weapon system is a joint venture precision rifle built for the U.S. Army Special Forces and the U.S. Navy SEALs.It was originally developed by the 10th Special Forces Group, based at Fort Devens, Mass., to fulfill a requirement for a sniper rifle based on a match grade M14 that satisfied the requirements of the Army Special Forces and the Navy SEALs.