Strike Fluted Barrel for SIG P320 (Full Size)Strike Fluted Barrel for SIG P320 (Full Size) Introducing the Strike Barrel for Sig Sauer P320's (full size). Made for Standard length and the Sig M17, this is an aggressive spiral fluted Strike Barrel that comes as a premium upgrade to your P320 pistol. From the pre hardened 416 stainless steel to the extreme tolerances, this nitrided barrel has a very high tensile strength and is very resistant to corrosion. From its fluting, there is also a weight