I have a question about this part also. I decided I wanted to put one on my Bushmaster 20" HBAR. Customer service tells me that they are availalbe, but can only be sold if installed at the factory by Bushmaster.
I'm having a local gunsmith rebuild my upper. Is there anyway I can order one and have him install it for me? Also is the price still the same as the old model, $89.95? If so can I get the part number?