Colt AR15/M16 Upper Adaptor Offset BushingAdapt your Colt large pin upper to fit your small pin lower with this offset adapter bushing.  On the Colt AR15/M16, the front pin that joins the upper receiver to the lower receiver is larger than the...

Colt AR15/M16 Lower Receiver Offset Adaptor PinEasily adapts Colt large pin lowers to fit standard small pin AR15 upper receivers, ensuring a precise, tight fit. Key Features: Compatibility: Designed to bridge older Colt large pin lowers with modern...