OMER, MB 2000-16 and MB 2000-20 All Spearguns >>> Spearguns by OMER More details and ordering info. Ceramic and graphite circular cross-section barrel. This special material replaces aluminum giving added regidity and lightness to the gun. Traditional Omer grip. MB 2000-16 is designed for 16 mm. rubber, the MB 2000-20 is for 20 mm. rubber. User input on MB 2000-16 and MB 2000-20 by OMER: Be the first to submit input on this product Submit Input: Your Name: Write or Paste Input here: Upload picture:      Review Guidelines