There are 4 of these. They were taken off of Arsenal guns immediately upon my receiving them. They have never had a round fired through them (unless they did at the factory) They are marked "US" and count as a compliance part.
These fit 5.45 and 7.62 rifles
The price for all 4 of them is $75 shipped to CONUS.
Please email me as I don't check my IM that often