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This is the standard replacement magazine for the KJW M4 GBB series. Built with a full-metal shell, it’s designed to be rugged enough for field use and matches the 3500g total weight of the rifle for a balanced, realistic feel.
This magazine runs on Green Gas or Propane and uses high-flow valves to push the KJW’s heavy bolt through a full cycle. It holds 32 rounds and uses a stiff follower spring to keep BBs feeding properly even if you're firing fast. KJW put reinforced O-rings inside to help stop the gas leaks you usually get with GBB mags, making it a solid choice for mil-sim or all-day field games.
This mag slides right into any KJW M4 gas rifle and has a matte black finish that won't scratch off easily. The baseplate is extra thick, which is a lifesaver if you drop your mag during a fast reload; it keeps the fill valve from getting bent or broken.
Features:
Heavy-duty metal construction
I'm happy with my purchase.