RRA's dedicated varmint configuration with a 20-inch heavy stainless steel barrel, free-float handguard, and flat-top upper. The Varmint A4 used RRA's two-stage trigger and a 1:8 twist barrel to stabilize .223 Rem projectiles from 55 to 77 grains for long-range varmint precision. Type: Rifle Action: Semi-Automatic Caliber: .223 Rem Capacity: 30 Year introduced: 2000, United States Weight: 128 oz Overall length: 39.5" Status: Active Intended use: Varmint Hunting, Target Shooting