The Daniel Defense MK12 SPR is a recreation of the US Navy SEAL Special Purpose Rifle, featuring an 18-inch Noveske-profile stainless barrel chambered in 5.56x45mm. The MK12 SPR was the designated marksman rifle of SEAL Team 6 and other SOCOM units. The Daniel Defense commercial version accurately replicates the upper receiver configuration. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm Capacity: 30 Year introduced: 2014, USA Weight: 7.9 oz Overall length: 37.5" Status: Active Military use: Yes Intended use: precision, duty, military collecting