AR-15 Offset Front Pivot Pin DPMS Adapts .250" Hole Upper to .312" Lower

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Adapts Military .250 Uppers front hole diameter to Lowers with 5/16 front pivot pin hole diameter. Works with SP-1 Lower Assembly. Allows you to mount a variety of AR-15 uppers to a variety of lower receiver. AR-15 DPMS Offset Front Pivot Pin