M4-76-18 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 STOCKSons of Liberty M4 SPR 223 Remington/5.56x45mm, 18″ Barrel, Black, Soft Case, 30rd $1,430.09 Original price was: $1,430.09.$800.85Current price is: $800.85. Add to cart