OMER, MB 30 All Spearguns >>> Spearguns by OMER More details and ordering info. 30 m.m. diameter, polyurethane foam-coated Ergal barrel. The head design has three functions: it protects the shaft from hitting the rubbers when leaving the barrel; it guides the shaft ballistically; it limits the quantity of water that passes through the rubbers when following the prey, thus reducing vibrations when aiming. Single-piece breech, compact moulded grip, soft thermoplastic rubber handle, characteristic head in heavy duty nylon. It is equipped with a 20 m.m. Dynamic rubbers, derlin wishbones and a 6 m.m. spring steel shaft. User input on MB 30 by OMER: Be the first to submit input on this product Submit Input: Your Name: Write or Paste Input here: Upload picture:      Review Guidelines