OMER, Master 2000-16 and Master 2000-20 All Spearguns >>> Spearguns by OMER More details and ordering info. The exclusive shaped carbon barrel with internal ribbing guarantees against flexing and the lateral convex system 'Buoyancy System' gives it perfect balance. The Master 2000-16 is designed for 16 mm. rubber, the Master 2000-20 is for 20 mm. rubber. User input on Master 2000-16 and Master 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