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M16A2 with Master Key
This combination of a M16A2 with a shotgun offers the opportunity to have both available as and when necessary. The Master Key consists of a pump-action shotgun attached beneath the Colt AR-15/M16 rifle, utilising the bayonet lug as the basic fixing point. A bayonet lug adaptor is attached to the shotgun barrel and a yoke adaptor to the receiver. This adaptor engages the ends of a special upper receiver to a lower receiver hinge pin. The bayonet lug adaptor has two spring pressure clips which fix the shotgun in place, allowing its removal by simply squeezing the clips.
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