The Sig P556xi pistols feature a 10" barrel and they come chambered in 5.56 NATO, 7.62X39mm, or 300 AAC Blackout. Pistols come with flip up front andrear sights and a 30-round magazine. The receiver is made of high strength steel with a durable wear-resistant Nitron finish. These P556xi models come with a polymer handguard.
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