ArmaLite AR-10 AR103GN18 18″ .308 Win 25+1 MBA-1

About this product

Purpose-built for 3-gun and practical rifle competition, the ArmaLite AR-10 AR103GN18 pairs a match-grade 18-inch barrel with a competition-oriented control layout. The rifle is optics-ready and fitted with an adjustable MBA-1 buttstock for individualized cheek height and length of pull. Controls include an ambidextrous safety and a Raptor-style charging handle for versatile handling. A Timney single-stage trigger and an adjustable gas system provide a platform that can be tuned for specific ammunition and recoil preferences.

Key Specifications

• Chambered in .308 Win / 7.62 NATO.
• The barrel measures 18 inches and is described as a heavy match-grade stainless steel profile.
• The rifling twist rate is 1:10.
• Feed capacity is 25 + 1.
• The action is semi-automatic.
• The trigger is a Timney single-stage design (pull weight values vary by source).
• The stock is an adjustable MBA-1 with adjustable cheekpiece and length-of-pull.
• The receivers are constructed from 7075-T6 aluminum with a black hardcoat anodized/black phosphate finish.
• The muzzle device is an ArmaLite tunable brake.
• The listed weight is 8.90 lbs.

With a mix of competition-focused features and a modular design, the AR103GN18 is a practical foundation for competitive shooters and enthusiasts who want a configurable platform. Its match-grade barrel, ergonomic controls and adjustable components make it well suited to stage work or precision-focused range sessions, while the durable receiver and hardware support long-term use and upgrades.

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