Home / Products / Dirty Bird Industries / Arsenal Inc. Buttstock left-side folding polymer 4.5mm pivot pin replacement for metal BLACK Arsenal Inc.
Arsenal Inc. Buttstock left-side folding polymer 4.5mm pivot pin replacement for metal BLACK Arsenal Inc.
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Aug 26, 2026
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Upgrade your AK rifle with the Arsenal Inc. left-side folding polymer buttstock featuring a precision 4.5mm pivot pin. Designed as a direct replacement for traditional metal stocks on stamped receivers, this Warsaw-length assembly delivers superior ergonomics and compact storage without sacrificing durability or performance.Key Features Left-side folding mechanism with slick hinge that accepts a 4.5mm pivot pin for reliable, smooth operation High-strength polymer construction in matte black finish for reduced weight and corrosion resistance Integrated scope rail recess for mounting optics directly on the stock Smooth-turning sling swivel and ribbed metal butt plate with cleaning kit trap door Buttstock catch release button for quick deployment and secure locking US-made by Arsenal Inc. for stamped-receiver AK platformsTechnical Specifications Length: Warsaw pact dimensions for classic AK profile Compatibility: Stamped receivers (fitting may be required on non-mil-spec variants) Color: Black Pivot pin: 4.5mm (sold separately as KR-001PP) Additional items: Cleaning kit sold separatelyWhy Choose This ProductTraditional metal triangle folders add unnecessary weight and can rattle over time. This polymer replacement solves those issues with a lightweight yet robust design that maintains the iconic folding functionality while improving balance and reducing fatigue during extended use. The 4.5mm pivot ensures a precise fit on compatible stamped receivers, making it ideal for tactical, range, or home-defense setups where compactness matters.Whether you're converting a fixed stock or refreshing an older folder, this Arsenal assembly provides OEM-quality engineering trusted by professionals and enthusiasts alike.Enhance your rifle's modularity and handling-experience the difference of genuine Arsenal craftsmanship today.
