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The Invector, or "Standard Invector" system" was introduced in 1983. A few years later, the Invector-Plus chokes were introduced to fit the new back-bored shotgun barrels. These two choke systems will not interchange. If you have screw-in chokes in your shotgun barrel, the kind of system you have will be stamped on the barrel near the receiver. You must use the proper choke system for your shotgun.

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โˆ™ 2007-05-28 01:18:44
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Q: Does a 1993 Browning Special Sporting Clays over-under use invector or invector plus choke tubes and what is the difference between the two?
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