The AR-15 platform continues to evolve with lighter, more accurate options for precision shooting and competitive use. A well-balanced rifle that marries low weight with a stiff, free-floated barrel can make a real difference on target at extended ranges and in dynamic stages.

ANGSTADT ARMS UDP-556 is a compelling entry for shooters who prioritize accuracy and handling. Chambered in 5.56 NATO, the UDP-556 features a 16″ chrome moly barrel with a 1:7 twist and is threaded 1/2×24 — letting you fit a wide range of aftermarket muzzle devices and suppressors. The rifle ships with a free-floated 16″ ultra light M-LOK handguard, a B5 Systems SopMod Stock, and a B5 Type-23 grip for improved ergonomics during long strings of fire. The model comes in an all-black finish and includes one 30-round magazine. Shop this product

Design and build quality

The UDP-556’s chrome moly 16″ barrel provides a balance of weight savings and heat resistance. The 1:7 twist rate stabilizes heavier 62–77 grain bullets, making the platform suitable for both duty-style loads and precision-oriented match bullets. The free-floated M-LOK handguard minimizes contact with the barrel, preserving harmonics and maximizing inherent accuracy potential.

Ergonomics and handling

B5 Systems components — the SopMod Stock and Type-23 grip — bring proven ergonomics straight out of the box. The lightweight handguard and compact 16″ barrel keep the rifle agile for competition stages or range drills while remaining comfortable for casual shooters. The all-black finish and included 30-round magazine make it ready to run from day one.

Practical applications and caliber benefits

5.56 NATO remains a versatile choice for target work, competition, and general training due to its flat trajectory, manageable recoil, and widespread ammunition availability. The 1:7 twist opens up heavier projectile options for shooters focused on longer-range accuracy or barrier-penetration scenarios with heavier bullets.

Accessories and modularity

Threading at 1/2×24 gives owners flexibility to add compensators, flash hiders, or suppressors. The M-LOK system supports modern accessory mounting without adding unnecessary weight. For pricing, the UDP-556 is listed at $1471.99 — an attainable step into a precision-minded AR platform. View product details and pricing

Who should consider the UDP-556?

Competitive shooters, precision-focused hobbyists, and those who want a lightweight, feature-rich AR-15 platform will find the UDP-556 attractive. Its blend of a free-floated barrel, 1:7 twist, M-LOK modularity, and quality stock and grip components make it a practical choice for serious training and accurate shooting. For current stock and ordering, Check availability

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