RA-4R实质上是Rhino武器公司的一个AR系步枪平台——上下机匣组件。RA-4R3GR步枪正是基于这个平台设计制造的一款专门针对三枪比赛的高精度步枪。该枪的上下机匣平台均采用铝合金材料制成,机匣左侧采用了一个非常特别的空仓挂机解脱杆,空仓挂机解脱杆从机匣左侧向下延伸到扳机护圈内部,射手在重新插入弹匣后右手食指可快速向左推压空仓挂机解脱杆以解除空仓挂机。同样为了更好地进行比赛,该枪设计 The RA-4R is essentially an Ar-based rifle platform from Rhino Arms - the upper and lower casing components. RA-4R3GR rifle is precisely designed and manufactured on the platform of a three-gun race precision rifles. The upper and lower casing of the gun are made of aluminum alloy material, the left side of the casing uses a very special empty hang up the release lever, empty hang up hangs the release lever from the left side of the casing extends down to the trigger guard, archer Re-insert the magazine after the right index finger to the left can quickly push the hang up bar to release the hook to release the hang up. The same gun designed for better competition