One of the shortcomings of H&K roller-delayed long guns has always been their triggers. As they come from the factory (with the exception of niche items like the PSG-1 trigger pack) they are long, heavy, and generally unpleasant. Good smiths can make them a bit better (I used a Bill Springfield t...

Before the invention of the roller-delayed system which would become the H&K G3, Mauser engineers in late World War Two built a small number of prototype roller-locked, gas piston operated rifles in 8x33mm, designated the Gerät 06. This would be followed by the Gerät 06(H) for "half-locked", whic...

Celebrating our 40th episode with a live fire video featuring a replica Gerat 06(H), the rifle that began the roller-delayed blowback dynasty which has included Spanish CETMEs and German HK's like the G3 and MP5. Developed by Mauser engineers from the gas operated Gerat 06, it produced a much lig...

The StG-45(M) was developed by engineers at Mauser right at the end of WWII, and its designers went on to form Heckler & Koch and this rifle was their basis for the H&K roller-delayed blowback series of weapons (HK91, HK33, HK53, HK21, MP5, etc). Twenty sets of parts for the StG-45(M) were produc...

Watch latest videos, sometimes even early releases! Sign up for the newsletter: http://eepurl.com/hkbJYn [or] slateblackindustries (dot) com 👉 Newsletter The PTR91 has established itself as one of the best and most reliable copies of the HK91/ HK G3 rifles. The roller-lock design traces back to t...

Today we are out at the range to compare the Angstadt Arms MDP-9 to the classic H&K SP-5. We will do a bunch of runs on a course of fire that incudes precision targets, spinners and stars, and see which of the carbines comes out ahead! Plus, as a bonus, some shooting with a suppressor and subsoni...

Today I am out at the range to do some side-by-side shooting with the CETME-L and the CETME-LC. These are both MarColMar examples, in the original Spanish military configuration (ie, iron sights only).

The LC model has a bit snappier recoil and more muzzle climb, which I suspect is due to the ...

The Sturmgewehr 45 (aka Gerat 06H) was the first functional roller-delayed blowback rifle developed, and it was slated to replace the StG44 as Germany's primary combat rifle when WWII ended. We have a reproduction of one made exactly to original spec, and we wanted to see how it would have fared ...

We took a look at the history and mechanics of the G41 yesterday; now it's time to actually try it out on the range!

It, ah, did not go so well. But I did get to see a cool new malfunction I had never seen before! In fairness to HK, this was a demo gun that has been used and abused. On the ot...

Watch latest videos, sometimes even early releases! Sign up for the newsletter 🗞️https://tinyurl.com/9HoleReviews or https://tinyurl.com/SlateBlack 🏅Current record holder - lowest round count for optic-ready service rifle (Tied with WWSD and SCAR 16, but the 650y target broke the tie with the fir...

Watch latest videos, sometimes even early releases! Sign up for the newsletter 🗞️https://tinyurl.com/9HoleReviews or https://tinyurl.com/SlateBlack The H&K G3 was a tremendously prolific rifle that was produced mainly in Germany, Portugal, Greece, Turkey, Pakistan and of course, the US copy by PT...

The HK21 is a the belt-fed iteration of the H&K roller-delayed blowback mechanism. H&K built a wide range of firearms around that system, including submachine guns (MP5), rifles (HK33, HK91), precision rifles (PSG-1), and machine guns. Originally they made a version in 5.56mm and one in 7.62mm, b...

Just how concussive is the HK51? And how hard is it to control? Let's find out!

Today I'm bringing the PCCs back out to the range, to try them out with a Woldman suppressor from Dead Air. This is a two-part suppressor that can be shortened a bit if you like, although I will be running it at its full size for maximum effectiveness. I'm using S&B 150 grain 9mm ammunition, whic...