Systema TW4 M90 Cylinder Spring Unit for PTW/MAX New Start Price USD 129.99 Current Price USD 129.99 Time Left - Bid Count 0 Buy It Now Price - Reserve Price - Start Time Monday, November 24, 2008 End Time Wednesday, December 24, 2008 Location Dupont, Washington See more about 'Systema TW4 M90 Cylinder Spring Unit for PTW/MAX New' Description You are bidding a brand new genuine M90 Spring Cylinder upgrade for the Sytema TW4 series PTW/MAX airsoft rifles. Recommended for use with Systema's 7.2V 2400mAh PTW battery. This unit came with TW4 so there is no box/package, and I only test fired a few shots.  The retail price of M90 is $189.99 and very hard to get.  You would save $60.00 here.  Good luck. Place a Bid!