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Old December 27, 2012, 03:49 AM   #6
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Join Date: October 9, 2009
Location: North Alabama
Posts: 5,972

Plooueff has the answer. The clamp adds support and a point for a sling swivel stud. The clamp is intended to make it difficult to prong the extenison. But you see heavy use guns w/o them.
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