Do a web search and check the auction sites.
Depends on model.
The value of a Eagle Arms 12GA companion varies slightly by its condition. As of 2014 the estimated valued of this item in excellent condition is 150.00.
Make AR15 parts and rifles
100-400 USD
100-500 USD or so
Do a web search and check the auction sites.
Talk to the guys at http://www.simpsonltd.com
100-1000 USD
12k-16k
value depends on overall condition.................
I would contact Rock River Arms directly.They will have the info that you seek.
the eagle on the Indonesian coat of arms is called Garuda