I use Kroil #9 along with a stiff brush. I put some directly into the gas and let it drip down into the barrel to soak, as well as the opening itself into the operating rod. I use my Otis to do the same to the bore. After 60 minutes or so, I use a stiff brush and scrub where I can and an old bore brush to hit the inside. Wipe down the outside with a paper towel and .22 patches for the inside. Clean the bore as usual and then turn on my compressor and dry the inside of the gas system. Clean and lube same as the M1 and I am ready to go. One thing I always hated on the AR-15 system was the racket the spring made in the stock, never cared for it. An even easier one to clean is the G3 weapon system, a shooter's dream. The Mini and the G3 are not overly sensitive to powder as is the AR-15 system so that is why I prefer the former and sans the later.
Sam
Sam

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