The VLTOR Weapon Systems A5 Receiver Extension Tube delivers rugged reliability for AR/M4 platforms, combining a durable black receiver extension with a precise 7-position stock interface to enhance fit and control. Built by a trusted name in rifle parts, this extension tube integrates seamlessly with M4/AR-15 stocks, providing solid alignment, smooth operation, and repeatable cheek-weld consistency across field and range use. The receiver extension is designed to complement the AR/M4 platform, offering robust strength and a clean, low-profile profile that supports a range of buttstock options while maintaining reliable cycling and consistent shootability in dynamic situations. Ideal for builders and upgrades, its compatibility ensures a straightforward installation for users seeking a stable, adjustable stock setup without sacrificing performance. The black finish resists wear and corrosion, making it suitable for duty, competition, or recreational firearms applications. Whether youre configuring a new build, replacing a worn component, or upgrading for improved ergonomics, this extension tube from VLTOR Weapon Systems delivers dependable fit, 7-position versatility, and the proven quality you expect for rifle parts and stocks and buffer tubes. Its a practical choice for AR/M4 shooters prioritizing reliability, adjustability, and solid handling.