45 COLT to .22 LR Caliber Adapter - Stainless Reducer - Set of 2 -Free Shipping! | eBay
X-CALIBER Survival-Rifle Gauge Adapter System - Soldier Systems Daily
12 Gauge Adapters
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Amazon.com : StrongTools Plastic Adapters Universal Red and Green Boresighter Suitable for .17 to 12GA Calibers (Universal Adapters, 2 Packs) : Sports & Outdoors
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45 COLT to .22 LR Caliber Adapter - Chamber Reducer - Set of 5 -Free Shipping! | eBay