Offering is a form of Offer. Offer is related to Opportunity. Opportunity is related to Available. 
Weapon is a type of Device. Device is a different concept from Machine. Machine is related to Copy. Copy is related to Exact. 
Offering --FormOf--> Offer <--RelatedTo--> Opportunity <--RelatedTo--> Available 
Weapon --IsA--> Device <--DistinctFrom--> Machine <--RelatedTo--> Copy <--RelatedTo--> Exact 