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The Best Sig P320 Upgrades in 2021

The Sig Sauer P320 is a striker-fired handgun platform that was designed from the ground up to be customizable and modular. It was developed to compete in the MX17 Modular Handgun System trials, which it won.  After winning the competition the P320 received the designations M17 and M18 and was adopted by the United States …

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