The TAC-13 applies the V3 semi-auto gas system to a 13-inch barrel non-NFA firearm with a bird's-head grip — the semi-auto counterpart to the 870 TAC-14. Not classified as a shotgun under ATF definitions due to lack of shoulder stock. Type: Shotgun Action: Semi-Automatic Caliber: 12 Gauge Capacity: 5 Year introduced: 2018, USA Weight: 188 oz Overall length: 25.3" Status: Active Intended use: Home Defense