KA-FF-01
http://www.kingarms.com/product_detail.php?id=1978
5.56mm Compact S.M.G. Patriot Kit. Fit for Marui M4 Series. Inner barrel in 230mm length. It can store up to 12 pieces of 1700mA battery (Diameter 17mm X length 50mm)
| Length | 50mm |
| Weight | -NA- |
| Thread | -NA- |
| Diameter | 17mm |
| Main Material | Aluminium |
| Major Color | Black |
| Accessories come with package | -NA- |