C marked Square Forged

I’ve got some questions about upper receiver forge markings. I know that the C stamped square forge is probably clone correct to most M4s but is there any specific builds that specifically use the following c stamp with square forge? Thank you.

I’ve got some questions about upper receiver forge markings. I know that the C stamped square forge is probably clone correct to most M4s but is there any specific builds that specifically use the following c stamp with square forge? Thank you.