AeroTech RMS-54 54mm 延伸浮動前蓋 - 54FFCES

The retaining ring fits perfectly on my current build, and the floating forward closure design made assembly much simpler than I expected. I’ve already used it with a 54mm reload and it held up without any issues.

Finally got this to replace a worn-out closure on my 54mm motor case, and the threads are noticeably smoother than the old one. The forward closure retaining ring seated securely without any extra effort.

The retaining ring fits perfectly and the extended closure gives me the delay I need for my heavier rockets. No issues with compatibility on the standard RMS hardware.