GaryM2Tac

I know this post is 7 years. I just purchased a new M2 Tactical, model 11052 5+1 magazine. My M2 shotgun did not came with a Spring Retainer. The small cup with a hole in the middle. As pictured above. However, I do have the limiter retainer ring. Based on this post it sounds like I should purchase the missing Spring Retainer cup. It seems too easy for that spring to accidentally pop out without it.

My new out of the box M2 Tactical with the 5-shot kit did not come with a magazine tube plug part number 068C. I noticed this when I was removing the tube limiter. It only has the retaining ring part number 086C. Should I have received both the retaining ring and tube plug?