03-19-2015, 09:08 PM
Look into laser engraving, they should be able to do something easily on the BCG so you can even verify when viewing through the port. its a bit pricy but it will look clean and be extremely effective.
http://www.artatarms.com/pricing.html
a review on his work
http://www.sincityprecision.com/?p=3972
http://www.artatarms.com/pricing.html
a review on his work
http://www.sincityprecision.com/?p=3972

