WE Glock gas blowback pistol/g-series G17 G19 G18C magazines for sale: CO2 mags: $30 for the pair Extended green gas mag: $27 All 3 mags: $50 CO2 mags have been used once for testing and are in like new condition. Extended mag has been fielded several times. None of the mags leak and all are in excellent working condition. Buyer pays shipping. No tr4d3s. Local to mid massachusetts.