Otter Creek Labs Polonium-30

New - Otter Creek Labs Polonium-30 Caliber: 30 Length: 5.8" Weight: 13.5 oz Diameter: 1.625" Build Material: 17-4 Stainless Steel Finish: Cerakote Full Auto Rated: Yes BARREL LENGTH AND FIRING RESTRICTIONS 7.5” – 5.56/223 and 7.62×39 10.5” – 6 ARC, 6.5 Grendel and other similar cartridges 12.5” – 308, 6.5 creedmoor, 6mm creedmoor, 243 winchester and other similar cartridges 16” – 300 win mag, 7mm rem mag, 300 PRC and other similar cartridges 18” – 300 RUM and 300 Norma mag