SIG SAUER SIG SAUER SIGM400

RIFLE: SIG SAUER MODEL SIG SAUER SIGM400, SERIAL NUMBER 20L183079, BLACK (MATTE), SEMI - AUTOMATIC, 5.56MM, NANotes:The SIG Sauer SIGM400 5.56 NATO Rifle is a semi-automatic, AR-15-style rifle manufactured by SIG Sauer. Introduced in 2011, it's designed for civilian, law enforcement, and sporting use, offering a balance of performance, reliability, and modularity.Key Features* Caliber:Most commonly 5.56x45mm NATO / .223 Remington, with some variants chambered in .300 AAC Blackout* Action:Gas-operated, direct impingement systemRotating bolt, firing from a closed boltBased on the traditional AR-15 operating system* Capacity:Uses standard AR-15/STANAG detachable magazines (typically 20- or 30-round)* Barrel Lengths:Commonly 16 inches, with other options ranging from about 14.5" to 20" depending on variant* Construction:Aircraft-grade aluminum receiversFree-float handguards (on newer models like the Tread)Steel barrel, often stainless or chrome-lined* Stock & Ergonomics:Adjustable/telescoping stockStandard AR-style controls (safety, magazine release, charging handle)Compatible with a wide range of aftermarket partsVariantsThe SIGM400 is actually a family of rifles, including:M400 Tread - entry-level, modular rifleM400 Elite / PRO - upgraded features (better trigger, barrel)M400 Predator - hunting-focused configurationM400 SDI / specialty models - enhanced ambidextrous controls and componentsPerformance & UseAccurate and consistent, especially with quality ammoModerate recoil, typical of 5.56 riflesKnown for reliability and solid build qualityCommon uses:Target shooting and range useHunting (varmint, predator, some deer with proper ammo)Home defense or general-purpose rifleSpecifications (Typical)Weight: ~7-7.6 lbsOperation: Semi-automaticPlatform: AR-15 patternGas system: Direct impingement