Planet Eclipse Shaft FR Back Color:HDE Pack “compresses” to give you

Pack “compresses” to give you the smallest silhouette possible

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lighter weight

Modern AR-15 Styling

Planet Eclipse Shaft FR Back Color:HDE Pack “compresses” to give youThe Eclipse Shaft FR ("FreakTM Ready") Barrel Back is compatible with "FreakTM" inserts* for optimized bore selection. The Shaft FR back assembles in a unique manner so that the ball is guided into the Insert via a tapered opening at the rear. The insert is held in place by the Joiner section which doubles as the interface to the Tip. The Shaft FR back has 3 windows that make it possible to quickly and easily identify which insert is being used as