Our good friends from Guru Arms (also known as Guru Upgrade) give us the latest update on their upcoming Czech vz. 58 AEG which they subject to some brutal tests on the material being used for production (he better watch his blood pressure, though it's good for some stress release) and comparison against the gearboxes of Chinese counterparts... "Hi, I would like to draw attention to our upcoming products vz.58 gun, now you can see the last two post video of a brutal test of withstanding our rough handle with a hammer and a comparison with Chinese manufacturing."

The sure put the new hammer to good use. More videos regarding the tests are available at their website.