The Daniel Defense MK12 MOD 1 SPR is the updated variant of the MK12 Special Purpose Rifle configuration, featuring an updated handguard and improved gas system optimized for the 18-inch barrel. Built to the MOD 1 upgrade specifications used by USSOCOM designated marksmen as a drop-in upper receiver group. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm Capacity: 30 Year introduced: 2016, USA Weight: 8 oz Overall length: 37.5" Status: Active Military use: Yes Intended use: precision, duty, designated marksman