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The Gun Gauge Adapter Insert set allows shooting the most popular centerfire pistol and shotguns cartridges through any SAAMI spec break-open 20GA shotgun. Includes 4 Inserts: 9MM, 357MAG/38SPL, 45ACP, .410/45COLT (All Rifled)
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12GA GUN GAUGE ADAPTER SET W/ 8 INSERTS
12GA GUN GAUGE ADAPTER RIFLED INSERT 380ACP/7″BBL
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