Strike Industries Modular Magazine Release for Sig Sauer P320 Black One Size. Here at Strike Industries they took it upon ourselves to see where they can improve this even more. The Modular Magazine release for the Sig Sauer P320 allows the user to add different sized extensions to the magazine release for better reachability and ergonomics. The advantage of the MMR over other extended magazine releases is the ability to hot swap extensions to suit the shooters needs without needing to take apart the entire assembly. Specifications for Strike Industries Modular Magazine Release for Sig Sauer P320: Manufacturer: Strike Industries Gun Make: SIG Sauer Gun Model: SIG Sauer P320 Color: Black Fabric/Material: Stainless Steel Features of Strike Industries Modular Magazine Release for Sig Sauer P320 Lightweight dropin design Durable stainless steel construction QPQ black coated 2 magazine button sizes to choose from Package Contents: Strike Industries Modular Magazine Release for Sig Sauer P320 x1 Modular Magazine Release body x1 Extended button x1 Set screw What firearm models does the manufacturer say Strike Industries Modular Magazine Release for Sig Sauer P320 is compatible with? The manufacturer suggests that Strike Industries Modular Magazine Release for Sig Sauer P320 is compatible with SIG Sauer P320Strike Industries SI-P320-MMR: Modular Magazine Release for Sig Sauer P320 Black One Size