Kaw Valley Precision Plan B Blast Shield .45 Caliber Nitride QPQ Black. The KVP Blast Shield is machined out of 17-4 stainless steel and features a Black Nitride finish ensuring that it will withstand countless shooting sessions. Specifications for Kaw Valley Precision Plan B Blast Shield: Manufacturer: Kaw Valley Precision Caliber: .45 Length: 2.95 in Weight: 5.9 oz Finish: Black Nitride Outer Diameter: 1.35 in Color: Black Features of Kaw Valley Precision Plan B Blast Shield Wrench flats for ease of installation OAL: 2.95in OD: 1.35in Bore: .500 Accommodates .46 caliber and smaller Package Contents: Kaw Valley Precision Plan B Blast Shield Kaw Valley Precision KVP-SHIELD-02: Plan B Blast Shield .45 Caliber Nitride QPQ Black