For your benefit and to avoid any misunderstanding between you and buyers, I don't think your description of the M4 is accurate.
You looked like you were on the right track in the previous listing of this bundle in thinking the M4 is by Cyma as the M4 looks more like the CM.515, especially with the warning label placement.
Specna Arms tends to place its logo on the left side of the magwell of its M4 replicas. The model name you mentioned also has the M-LOK rail system on its handguard, unlike Keymod shown in your image.