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AR Maglock KingPin for Gen 2 & Gen 4 AR Maglock systems on AR-15 .223 / 5.56 platforms.
The KingPin allows for minimal separation (action disassembly) of the upper and lower receivers. The new KingPin holds the upper receiver from flying open when disassembling the action.
Just a simple push on the pin with your thumb opens the action for mag changes, then automatically re-locks when you push the receivers together.
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