Echo 1 M4 CQB End Cap with Sling Swivel

Echo 1 M4 CQB End Cap with Sling Swivel

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  • $33.00
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The Echo 1 M4 CQB End Cap with Sling Swivel is the yin, to your yang. You've found what you're looking for.

Inventory Last Updated: Jun 23, 2026