Sig 556xi rail Gatewood Supply Co is your Swiss Sig Sauer Sig SG 556 rifle, barrels, bolt carrier groups, sights, triggers, trunnions, magazines, parts kits and accessories source. The rail has multiple sling attachment points and a continuous top rail. Made from 6061 aluminum Type 3 hard black anodize Compatible with SIG 55X (Gen 2) or 522 rifles and pistols We build the toughest, most precise rifles, pistols, suppressors, optics, ammunition, and airguns, while offering the finest firearms training. STARSamson Tactical Accessory Rail System Fits Sig 556 (3hole) Top rail 19 inches long Free Float Rails 1913 Picatinny Milspec Jul 30, 2022 ยท We take a look at the Sig Sauer 556, learn more about its origin, and ultimately answer the questionwhat happened to the 556? W WARNING This SIG SAUER 556xi kit comes complete with all parts, tools, and detailed instructions for installation. W WARNING This SIG SAUER 556xi kit comes complete with all parts, tools, and detailed instructions for installation. For example, SIG recoil spring is located in front of the action versus AK’s spring being behind the bolt carrier. Shop for official factory direct handguards and suppressor compatible handguards from SIG SAUER. A. The Sig Sauer 556xi is a multi-caliber adaptive carbine that carries the tradition of the SG 550 rifle on which it is based. Do not alter any part or add or substitute any parts or accessories not manufactured by SIG SAUER Inc. ywbibkhlikozvzhmpryooidzlmjcloxcslekebwdgeozrztqehorfyzzfxtfgolrn