Maintain an M4 or M4A1 Carbine Reviews
Lubricate Upper Receiver Group
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&pageText=To lubricate the upper receiver group and the carrying handle of the M4/M4A1 carbine, these steps must be completed:& &label1=Lubricate the inside of the upper receiver, bore and chamber, locking lugs, and outer surfaces of the barrel& &label2=Lubricate the mating surface of the carrying handle assembly and the upper receiver& &label3=Lubricate the front sight detent& &label4=Lubricate the rear sights, to include the elevation screw shaft, the elevation knob, the windage knob, and the windage screw& &popText1=Lightly lubricate the inside of the upper receiver, bore and chamber, locking lugs, and outer surfaces of the barrel. Lightly lube means apply a film of lubricant barely visible to the eye.& &popText2=Lightly lubricate the mating surface of the carrying handle assembly and the upper receiver. Apply a drop or two of lubricant to both threaded studs and lightly lubricate the clamping bar and both round nuts.& &popText3=Depress the front sight detent and apply two or three drops of CLP to the front sight detent. Then depress several times to work lubricant into the spring.& &popText4=Use one or two drops of CLP on the rear sights. Rotate the elevation screw shaft, the elevation knob, the windage knob, and the windage screw to ensure lubricant is spread evenly above and below these components.&
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