AR0940B View cart “Rock River Arms Complete Lower with National Match Trigger, A2 Stock, 5.56” has been added to your cart. Showing the single result Default sorting Sort by popularity Sort by average rating Sort by latest Sort by price: low to high Sort by price: high to low Sale! IN STOCKRock River Arms Complete Lower with National Match Trigger, A2 Stock, 5.56 $356.49 $320.84 Add to cart