Maintain an M4 or M4A1 Carbine Reviews
Inspect Upper Receiver Group
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&pageText=To inspect the upper receiver group of the M4/M4A1 carbine for serviceability, these components must be inspected:& &label1=Forward assist assembly& &label2=Ejection port cover& &label3=Rear sight windage and elevation knobs& &label4=Carrying handle assembly& &label5=Front sight assembly& &label6=Bore and chamber& &label7=Bolt lugs& &label8=Slip ring& &label9=Compensator& &label10=Bolt guide rails& &popText1=Check the free movement of the forward assist assembly.& &popText2=Check for a broken or damaged ejection port cover.& &popText3=Check the rear sight windage and elevation knobs for damage or looseness.& &popText4=Check the carrying handle assembly for missing or damaged parts.& &popText5=Check the front sight assembly for damage.& &popText6=Inspect the bore and chamber for pitting or obstructions.& &popText7=Inspect the bolt lugs for cracks and burrs.& &popText8=Check for free movement of the slip ring.& &popText9=Check the compensator for proper alignment.& &popText10=Check the bolt guide rails for chips and burrs.&
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