Viper Tech MK-12 GBB Airsoft Rifle

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Prices last checked August 21, 2026 across 2 retailers.

About Real Mk12 Rifle The Mk 12 rifle, officially designated the Mk 12 Special Purpose Rifle or SPR, was a semi-automatic designated marksman rifle used by United States Special Operations Forces. Developed in the late 1990s to fill the gap between the standard M4 carbine and larger, heavier 7.62mm sniper rifles like the SR-25, the Mk 12 was a purpose?built, highly accurate weapon system designed to engage targets at extended ranges. The need for such a weapon was first identified by the 5th Special Forces Group, which wanted a platform with greater effective range and accuracy than the M4 but without the bulk of a full?powered sniper rifle. Managed by the Naval Surface Warfare Center Crane Division, the project initially began as a Special Purpose Receiver?an upper receiver assembly meant to be swapped onto an existing M4A1 lower receiver to create a precision rifle. However, it was eventually type?classified as a complete, standalone weapon system, and the acronym SPR was redefined as Special Purpose Rifle. The Mk 12 officially entered service in 2002 and saw extensive combat during the Global War on Terror before being phased out around 2017. The Mk 12?s exceptional accuracy came from several key design features working together as a system. The standout feature was its free?floating, match?grade stainless steel barrel, which was built around an 18inch heavy profile with a 1:7 inch rifling twist?a twist optimized for heavier projectiles. The rifles performance was tied directly to the Mk 262 ammunition, a 77 grain match?grade round designed for long?range accuracy and consistent terminal effect. The gas system was a rifle?length, direct impingement system, which contributed to smooth operation and reliability. For optics, the standard sight was a Leupold Mk 4 2.5?8x36mm scope, calibrated specifically for the 77 grain Mk 262 round fired from an 18inch barrel. There were three main production variants of the Mk 12, distinguished primarily by their handguards and ba

Viper Tech MK-12 GBB Airsoft Rifle price comparison: the lowest price is $1870.11 at eHobby Asia, the highest is $1871.99, and the median across 2 tracked listings is $1871.05.

Compatible with: M4/AR, SR-25

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