Polishing & Shaping a G2 hammer

[ronin]

I know some people have issues with the G2 hammer catching the bolt carrier and wanted to show what I do or at least give an idea as to what I do.





I do the following with the rifle assembled and keep testing the feel of the action as I go. The idea is to take off a very small amount and test and then keep repeating. The amount of material being removed is tiny.

1. Essentially I take the small flimsy medium-grit sanding discs and stack two of them to make the resulting assembly a bit more rigid. Beware of using a coarse grit or another agressive means as you could take too much off and the resulting polish is very important.

2. I start with the part of the hammer just above the mass at the top and add just a bit more angle. It's hard to tell in the pics but I really do not take off much. I only change the angle on the part of the hammer's lever arm above the mass. You do not want to change the geometry where the lever arm strikes the firing pin. That area should be polished but nothing else.

3. I polish the hammer's surface and the bottom of the bolt carrier. The hammer here I did last night and there were casting ridges on the hammer that were catching on the carrier.

4. I double check the rails and the ejector for any burs / ridges and sand/buff them down. Usually after I make the rails I use a die grinder with a medium grit roloc scotch bright disc to quickly buff/debur the rails. I did a bit of touching up on the rails so I again buffed the rails. That's why there is so much reflected light - the surfaces are quite polished.

5. To lube the action I use a acid brush to apply a very light coat semi-synthetic Valvoline wheel bearing grease to the back of the hammer where the carrier rides, any contact areas for the trigger hook and disconnector, plus a bit where the bolt cam travels in the carrier.

The result is a very smooth and fast action. Again, my biggest caution is to not go fast polishing/shaping. You can always take more off but it's pretty hard to put material back on :-)

I hope this helps some.