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Timber Creek Outdoors TCO Enforcer Upper Parts Kit for AR-15, Blue - E UPK B

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Timber Creek Lower Parts Kit, Black - AR LPK BL

Timber Creek Outdoors AR Lower Parts Kit for AR-15, Robin's Egg Blue - AR LPK RE

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Timber Creek Outdoors TCO Enforcer Upper Parts Kit for AR-15, Red - E UPK R

AERO PRECISION M5 .308 Stripped Upper Receiver - Anodized Black