Upper Receiver Modification

[mh3007]

I’m trying to find someone who can open up the ejection port on a slick sided upper for a 458 socom build. Thank you for your assistance.

[scrid2000]

I’m trying to find someone who can open up the ejection port on a slick sided upper for a 458 socom build. Thank you for your assistance.

I've got a dremel and some Birchwood Casey alumi-blue

[Rottenryan]

Not sure what your timeframe is but I might be able to help if no one else chimes in.