they are measuring to the end of the Muzzle device specs from century Specifications CALIBER 7.62x39mm CAPACITY 30 rds. BARREL12.25" OAL 21.50" WEIGHT 5.5 lbs PRODUCT SKU CALIBER CAPACITY BARREL OAL WEIGHT Draco Pistol HG1916-N 7.62x39mm 30 rds. 12.25" 21