Rock River Arms | LAR15X Varmint A4 | .223 Rem | 20in

The Rock River Arms LAR15X Varmint A4 is a purpose-built modern sporting rifle chambered for .223 Rem/5.56 NATO with a 20-inch stainless bull barrel and A2 fixed stock. It pairs accuracy-oriented features — including a free-float handguard and a two-stage varmint trigger — with a robust, flat-top upper for optics. For an optic under $1,000 that complements this package, consider the Vortex Viper PST Gen II 1-6×24 for versatile close-to-mid range precision and fast target acquisition.

Product Specifications

• The UPC is 842834117390.
• The caliber is listed as .223 REM/5.56 NATO.
• The action is Semi-Auto.
• The barrel length is 20 inches.
• The rate of twist is 1:8.
• The overall length is 38.25 inches.
• The weight is 9.4 pounds.
• The magazine capacity is 20 rounds.
• The rifle uses a detachable magazine.
• The stock material is synthetic and the stock color is black.
• Sights are listed as no (flat top upper provided for optics).
• Other features include a RRA free-float 17″ aluminum M-LOK handguard and a stainless steel bull barrel.
• The rifle includes a two-stage RRA Varmint trigger and one 20-round magazine.

This LAR15X Varmint A4 is configured for accuracy-focused field use such as varmint hunting and precision target work where the 20″ bull barrel and free-float handguard provide stabilized harmonics and consistent performance. The flat-top upper and included features make it straightforward to outfit with a low-magnification precision optic for fast, repeatable shots at extended ranges.