I have a very good to excellent condition ARMS 45C SIR.
This SIR has the factory plastic cover on the bottom in TAN. It has a little wear on the screws from mounting but otherwise is in excellent condition. Comes with the standard three mounting rails (3, 6 and 9 o'clock) and sling swivel. Some light wear on the rails from mounting lights and accessories. Asking $305 plus shipping. reduced to $300 shipped
I don't have a digital camera but can be viewed at: www.armsmounts.com
Drop me a line if you have any questions. Cheers