Ruger AR-556 Marble Distressed | 5.56mm | 16.10″ Barrel

The Ruger AR-556 in the “Marble Distressed” finish is a purpose-built semi-automatic rifle chambered in 5.56mm with a 16.10″ cold hammer-forged barrel. It pairs modern materials—7075-T6 aluminum forgings and heat-treated steels—with an M-LOK free-float handguard and a six-position telescoping stock for a versatile platform. For an optic under $1000 that complements the rifle’s intended use, consider the Vortex Strike Eagle 1-6×24 for close-to-mid range engagement and quick target acquisition.

This rifle is well suited to range training and practical competition applications, and is also appropriate for varmint and small-game field work when local regulations allow.

Product Specifications

• The UPC is 688099402631.
• The caliber is listed as 5.56mm.
• The included stock is a Synthetic Collapsible six-position M4-style buttstock.
• The handguard is a Free-Float style with M-LOK attachment slots.
• Sights are listed as None (flat top upper for optics).
• The barrel measures 16.10 inches and is a heavy contour cold hammer-forged alloy.
• The barrel thread pattern is 1/2″-28.
• The rifling twist is 1:8″ RH.
• The standard magazine capacity is 30 rounds; one 30-round Magpul PMAG is included.
• The finish is a Custom Marble Distressed coating with matte black oxide on the barrel and flash suppressor.
• The rifle height is listed as 7.20 inches.
• The unloaded weight is listed as 6.7 lb..
• The overall length is listed as 32.25 inches to 35.50 inches depending on stock position.
• The length of pull is listed as 10.25 inches to 13.50 inches depending on stock setting.
• The barrel has 5 grooves.

Built with aerospace-grade 7075-T6 aluminum forgings, a shot-peened and proof-tested 9310 steel bolt, and an 8620 steel bolt carrier, this rifle reflects a focus on durable components and serviceable construction. The flat-top upper receiver with Picatinny rail makes mounting a magnified optic or red dot straightforward, and the enlarged trigger guard accommodates gloved use. Ergonomic controls and a Magpul PMAG supplied in the box allow immediate use out of the case with common accessories.

The AR-556 Marble Distressed balances modern manufacturing with practical features that suit shooters who want a reliable, optics-ready AR-style rifle for the range, competitive stages, or field use. Its combination of materials, a free-float M-LOK handguard, and a 1:8″ twist barrel give it flexibility for a wide range of 5.56mm ammunition weights and real-world shooting tasks.