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Where Ar15s are concerned, I use a light synthetic grease over a coating of "Tef-Dri" where the carrier slides in the reciever and on the contacting sides of the cam pin.
Ballistol on the inner bearing surfaces of the bolt, gas rings, ejector, and firing pin.
A coating of "Tef-Dri" on the locking lugs of the bolt.
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"Truth, by manner of Force, may be crushed to the earth, but crushed or not, Truth is still Truth.
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