This guide details how to access the often-stiff trap door compartment found on the buttstocks of M16A1, M16A2, and AR-15 rifles. Originally intended for cleaning kits during the Vietnam War era, this feature remains useful for storing batteries or spare parts on modern retro builds. The video emphasizes the need for a tool to pry open newer or stiff trap doors, highlighting a practical aspect of maintaining older rifle designs.
This guide details how to access the hidden storage compartment within the fixed buttstock of an M16 rifle. The process involves locating the trap door on the buttplate and using a spring-loaded latch to open it. This compartment is useful for storing small essential items like cleaning supplies or batteries.
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