Sling Swivel Assembly, Standard, M4/M4A1

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Colt M4 Sling Swivel Kit:  M16A2, M16A3, M16A4, M4, M4A1

Originally developed for use with the M203 Grenade Launcher, this military side-mounting sling adapter (kit) will fit onto any barrel with a 0.750 front sight base.

The swivel is factory riveted - comes ready to install.  (Ref. photo)