Larry Medler has come up with a smart little invention -- a simple, inexpensive Empty Chamber Indicator for rimfire rifles. It is made from a section of plastic weed-wacker line and a wooden ball from a hobby shop.
SAP Chamber Plug - Rimfire Empty Chamber Indicator – Short Action Precision
MTM CFP Pistol & Rifle Chamber Indicator Flags, USA Made, Yellow : Sports & Outdoors
22 Rimfire
high visibility Saftey Yellow smaller diameter shaft accommodates all popular calibers down to .177 cross section design makes the OCI much more
10 Pack Open Chamber Indicator Safety Flags (Safety Yellow)
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Vudoo, Bergara, RimX Range Safety Chamber Flag
What do you use for a chamber flag?
Super Tactical .22 LR AR Pistol [Spare Parts Build] - Pew Pew Tactical
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Ruger SR22: Versatile 22LR Pistol [Hands-On Review] - Sniper Country
Empty Chamber Ejectable Safety Flag Load Indicator Brass Bottom .223 / 5.56 Caliber, AR15 Accessories, AR15 Tools, Gunsmithing Tools, Pistol Accessories