充電用ラバーキャップ #R5 _RR-デラックスレシーバー

The rubber on this cap is firm enough that it doesn't pop off when I stuff the receiver in my vest pocket. I grabbed one for the speaker port cover, and it seals flush with no gap. Exactly what the RR Deluxe needed.

Took me a while to find a cap that fits this receiver's right launcher port properly, and this one snaps on snug without popping off in my pocket. Good that they sell it individually too, since I only needed the one.

Finally, a replacement cap that actually fits snugly over the right launcher port instead of popping off mid-session. The rubber feels sturdy enough to last, and it sealed the external speaker port perfectly on my first try. Exactly what I needed to keep the mud and moisture out.