556 Upper Receiver, thoughts?

Originally posted by u/dxscxnd98 at 2025-06-09T01:48:11Z

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Full printed 223/556 upper receiver I have came up with. Similar to Biden’s Bane. Barrel Nut is held on with 4 m4x25-30 screws and the handguard is secured by 3 m4x25mm screws. Thoughts, criticism welcome. This has just finished in cad, have not tested. As is probably wouldn’t be the most durable, but I am just trying to come up with a decent printed upper that will work.