The bolt and carrier scraper. Gotta tell ya, I'm anal about cleaning and am always on the lookout for a better mousetrap. The bolt tail scraper peeld carbon right off, like peeling an orange. A quick twist or two with my green Army-style scratchy pad afterward and I was done with the bolt tail. No shit. Maybe a minute total if I wasn't BS'ing with my buddy as I cleaned.

The carrier scraper part was much better with the patch used. Not as great for actual scraping, but the patch through the slot makes for a tight fit and really does wipe it out back in there. My MOACKS has a better actual scraper.

All in all the CATM4 is highly recommended. I think even QUIB would like it!

This

Meh. I have one of those too and I think the CATM4 works better quicker.

YMMV.

The CATM4 looks pretty good - would be worth a try at $35.