The AR is an easy platform to take care of but, for a person that is new to the AR platform it can look like a lot to take care of.
Here we are going to go over how to lube your ar so you get the best lube possiable and get it all in the right spots.
I use a combo of Grease and Oil. I have and love Wilson Combat Moly Lube for my grease and Mobil 1 0w-40 fully synthetic motor oil. It goes on easy and stay put.
First area we are going to talk about is the bolt. I put a drop of oil on the Gas rings and use my finger to work it in and then work it on to the back of the bolt. You can see where in the picture below.
Next we will go over the bolt carrier. the bolt carrier has 5 spots I lube with a touch of grease. You will be able to see them on your because they will shot some wear from the bolt cycling. I have pointed them out in the picture below. I use grease here because this is a high friction area that needs all the lube it can get as it is a STEEL bolt carrier riding on and in an aluminum upper.
Next is the charging handle. This is an area that many people just forget about as it is only used to rack the bolt and charge the weapon. I add one spot of grease on the top of each side at the retaining bumps. I then add a small drop of oil in the retaining latch to help it operate smoothly. Then I add a small spot of grease to the upper where the latch seats on the house side of the upper. This is just to help ease wear and tear on the upper for me.
Last but not least Your lower receiver. Here is don't use any grease as there is just that the high amount of friction that I think it needs it. Here I lube all points with a drop or two of Mobil 1 then I cycle the hammer by hand along with the safety. I do this to help work the oil into the small nooks and crannies in the lower.
I don't prescribe to the old DI trick of spraying it with CLP till it runs out the top of the lower. I think this method will allow you to have a very functional AR with out all the goop and grit from over oiling. It also doesn't spit in your face or drip on your new super cool blue camo tactical pants and your glock in your drop holster.
Hope this little how to helps keep your AR in tip top shape and it should make it a tad easier to clean.