Complex sentence: These items are typically marketed as being "post-sample" materials for Federal Firearm Licensees and are used in the manufacturing of select-fire variants of the AR-15 for law enforcement, military and overseas customers.
Split into simpler sentences: These items are typically marketed as "post-sample" materials for Federal Firearm Licensees. They may be used to manufacture select-fire variants of the AR-15 for sale to law enforcement, military and overseas customers.