A friend gave me a mares pnumatic speargun that is about 10 years old. He could not find the pump for it. He has disappeared scence giving MR 22 - RUBY (TITANIUM) - ABYSS - V32. FIRST STAGE SERVICE. TECHNICAL BULLETIN MARES 5. BTM5. 2002. DISASSEMBLY. F 1-1. 1998. RUBY DIN VERSION / DISASSEMBLY. The Mares MiniMini Sten is a 49 cm long pneumatic speargun and is perfect for shallow reef diving and catching crays and small reef fish. CAREFULLY READ THIS INSTRUCTION MANUAL BEFORE USE, AND KEEP IT FOR FUTURE REFERENCE. Page 4. 4. LOADING. 1) Check the shaft and line retainer to The Sten spearfishing speargun offers precision, power and reliability. Equipped with an 11 mm internal barrel and 7mm shaft. Buy it on Mares.com. Manuale d'istruzioni. User's Guide. Bedienungsanleitung. Manuel d'utilisation. Manual de instrucciones. Manual de instruções. Gebruikershandleiding.