The SIG SG 563, introduced at IWA 2025, offers significant modularity by featuring an AR-15 compatible lower receiver. This allows for the use of standard AR-15 grips, triggers, and safety selectors, along with a removable adapter that enables the use of either AR-15 or original SIG 550 magazines. The rifle boasts fully ambidextrous controls, including bolt catch and magazine release, enhancing its ergonomic appeal for a wide range of users.
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