Classic Army Hop-Up

Classic Army Metal Hop Up Chamber for M4/M16 Series Features & Specs: Manufacturer: Classic Army Model: P050M Material: Metal Type: One Piece Hop Up Chamber

The Classic Army 2 piece hop up chamber is one of the original aeg design. It fits M4 series AEGs that has a 2 piece hop up system from KWA, Echo1, Tokyo Marui, AGM Features & Specs: Manufacturer: Classic Army Model: P037P Material: Plastic

  Features & Specs: Manufacturer: Classic Army Model: P077PT