I have an ARMS #40A2 BUIS for sale for $85 shipped Sold!
. I had it on my upper for a several range trips and a few hours of jack rabbit hunting. It's in excellent
condition and I still have the original packaging and some of the lock-tite that it came with. I'll have some pictures up shortly, or email me and I'll send some to you. Paypal + 3% or USPS MO is accepted. I'll have it shipped within 24 hours of receiving payment.
BTW, I have positive feedback in the Feedback
forum. Scroll down to "Mageever".
ETA: Picture from my lousy digital camera that has lived in neglect due to my expenditures on gun stuff