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Hera USA Side Folding Unit, Weapon Systems with AR15 style buffer tube assemblies. Fits AR15 reciever thread pattern. Will not work with standard pass through buffer/spring assembly. 5-03
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ACE Folding Stock Mechanism For AR Type Stocks With Boss, Fits AK Rifles A504-K
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ACE ACE Folding Stock Mechanism, For AKs to Allow Any ACE AR Style Stock to Fit A504