The Raven Concealment Systems TopStop Cover in Yellow (brand part no. TOPSTPYL, model TopStop) snaps onto most AR15 or M4-type upper receivers when they’re detached from the lower, completely sealing the upper against fouling getting in or out during storage or transport. It also stops the bolt carrier group and charging handle from sliding out of the upper, keeping the assembly intact and clean when the rifle is broken down for cleaning, shipping, or storage.

Key Specifications

• Snaps onto most AR15/M4-type upper receivers when detached from the lower.
• Seals the receiver to keep fouling out during storage and transport.
• Prevents the bolt carrier group and charging handle from sliding out of the detached upper.
• Finished in high-visibility yellow for easy identification in a gear bag.

Frequently Asked Questions

Does the TopStop work with any AR-15 upper? It’s built to fit most standard AR15/M4-type upper receivers; unusually shaped or heavily modified uppers should be checked for fit.

Does the cover keep the BCG from falling out during transport? Yes, that’s one of its core functions — it holds the bolt carrier group and charging handle in place inside the detached upper.

Buy the Raven Concealment TopStop Cover

Keep a detached upper clean and intact with a Raven Concealment Systems TopStop cover from our other AR15 accessories & parts selection. Order it from our Lubbock, Texas gun shop for fast, direct shipping.