Airtech Studios – Buttstock Extension G&ahttps://onlyairsoft.com/wp-content/uploads/2023/10/blog-6.jpg;G ARP9 &ahttps://onlyairsoft.com/wp-content/uploads/2023/10/blog-6.jpg; 556 Series GOS-V5 Series
Made by Airtech Studios, this buttstock extension lengthens the rear stock to give a better weld to your shoulder.