Airsoft GI have the new PTS Masada GBB available for pre-order:
The all NEW Gas Blow Back Masada by PTS is now available for Pre-Order on airsoftgi.com! The PTS Masada is an airsoft GBBR (Gas Blow Back Rifle), KWA derived gas system, and is the most authentic replica of the Masada on the market. It features all the details and modularity of the actual Masada including fully ambidextrous fire controls and tool-less rapid disassembly body components. The rifle can be rapidly reconfigured for length and stock type with basic or no tools. International customers, simply add the item(s) you need to your cart and click the blue global checkout button to calculate shipping and complete your order. Over a thousand products are being restocked daily!
