This TTI base pad does add a little extra weight to the magazine which helps the empty mag drop free easier for faster reloads. This TTI SIG base pad, just like all of our base pads, is designed to give you the edge over your adversaries. We use our patented push pin design to lock the base pad to the magazine, which makes for easy field stripping and cleaning your magazines between stages. Just push down the pin, slide the base pad onto the magazine and push the pin up to lock the base pad onto the magazine. Our one piece design is great because there are no extra parts or tools needed to attach the base pad to your magazine. The base pad itself is machined out of billet aluminum and is hard anodized to ensure durable long lasting color. Specifications for Taran Tactical Innovations Base Pad For Sig Sauer P320 9/40 Magazine: Manufacturer: Taran Tactical Innovations Fabric/Material: Aluminum Caliber: 9mm Luger, .40 S&W Gun Make: SIG Sauer Gun Model: SIG Sauer P320 Features Taran Tactical Innovations Base Pad For Sig Sauer P320 9/40 Magazine: Patented proven push pin design Super easy to attach and detach from the magazine No specialty tools or devices required to disassemble One piece design, no extra parts to possibly lose during disassembly The added weight helps the magazine drop free easily for faster reloads CNC machined from billet aluminum Hard Anodized Package Contents: Taran Tactical Innovations Base Pad For Sig Sauer P320 9/40 Magazine Spring What firearm models does the manufacturer say Taran Tactical Innovations Base Pad For Sig Sauer P320 9/40 Magazine is compatible with? The manufacturer suggests that Taran Tactical Innovations Base Pad For Sig Sauer P320 9/40 Magazine is compatible with SIG Sauer P320