Update, Grendel

I touched up the serial numbers on my KTO lower for the Grendel. Acetone removed the adhesive holding the template on the receiver.


Then a short turn in the sandblaster, and a brief immersion in dilute sodium hydroxide to open up the aluminum's pores.

Then I rigged up an anodizing bath as described by tomh. Sulfuric acid was available at the auto parts store, and much cheaper than I expected. The voltage was provided by the pickup truck. Aluminum rod threaded into the pistol grip screw hole suspended the lower in the bath and away from the cathode. A piece of roll flashing served as cathode.



Now the part is being boiled in distilled water to close the pores up and finish hardening the anodized layer.

Tomorrow maybe the teflon-moly treatment, and then I can assemble the lower half of the Grendel on it. All the remaining parts are here and frankly they're kinda pissed I haven't put them all together yet.