MP5/10: FBI's super-charged submachine gun, with firearms expert Jonathan Ferguson

Comments · 865

• DR

  @Dreadnought505 · 2 years ago

  The 10mm round is rugged, reliable and ubiquitous making it a popular choice for wastelanders.

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• ST

  @stephenwalton9646 · 2 years ago

  A SWAT Team friend of mine questioned a HK rep about the lack of hold open on their 9mm weapons. The response,”We don’t want the adversary knowing you’re out of ammunition.” His quip to that was,”I should think one of us should know.

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• JA

  @jarvy251 · 2 years ago (edited)

  I think this is the first physical example of a 10mm MP5 I have ever seen after reading about them in the Rainbow Six novel over 20 years ago.  I actually didn't know about the bolt catch, I can only imagine the arm twisting that would have been required to get it added as HK is infamously resistant to any attempts to improve their designs for the people who actually use them.

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• TE

  @texas-raider · 2 years ago (edited)

  I worked for the US Dept. of Energy for about 5 years, and back in 1993 I went through their SRT School at the DOE Central Training Academy, located at Kirtland AFB in Albuquerque. &nbsp;It was a fantastic month long school, and during the last few days each student was required to do a series of room entries with an instructor so the student could be graded on skills. &nbsp;Our issue entry weapon was the normal MP5A2, which was easy to manage through doorways. &nbsp;As I started my turn at the entry scenarios, I noticed the FI instructor I was going in with was carrying an MP5 with a large, straight, translucent magazine. He didn&apos;t tell me he was going in with a 10mm MP5, Hell I didn&apos;t even know such a beast existed. But to my extreme surprise, the first room we went into saw me come up off the ground as he rapid fired that thing about 4 feet from me at a &apos;Kill&apos; target. &nbsp;That room and every other subsequent room we went into, especially the smaller rooms, were literally shaking when he fired that thing. &nbsp;At the time, the DOE&apos;s SRT protocal was that if you had to fire, then you <b>always</b> fired a &apos;Failure Drill&apos; (or originally called a Mozambique which is 2 to the body, 1 one to head), so that&apos;s six rounds of 10mm in about 1.5 seconds at every hostile target he fired at. &nbsp;After I completed the course (yeah, I passed), I asked him &quot;What the Hell was that??!&quot; &nbsp;He explained it to me, said he wanted to put a bit more unexpected, surprise stress on me so he brought in the big ten... his plan worked very well. He further explained that the MP5/10 had options for both a moderate power bolt and a full power bolt, then asked me which one I thought he used. &nbsp;Duh....no question, I knew. &nbsp;He was running the old WInchester 175 grain Silvertip rounds, which back in the late 80&apos;s and early 90&apos;s were LOT hotter than they are today. &nbsp;I can confirm that having 6 to 12 rounds of full power 10 coming out of an almost 9&quot; barrel in a 10x12 room will get your attention. &nbsp;If you&apos;re not expecting it, it&apos;ll get you off your feet. &nbsp;Thanks for the video, brought back a nice memory!

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• SA

  @Saint_Wolf_ · 2 years ago

  I saw the community post of an MP5 silhouette with a straight mag and thought &quot;nah, impossible, they can&apos;t!&quot; bur you did you madlads! A 10mm MP5!

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• JO

  @JonathanFergusonRoyalArmouries · 2 years ago (edited)

  A bit of new information thanks to Hans-Christian Vortisch - this fixed stock auto/burst configuration was apparently standard issue for FBI Special Agents (as opposed to specialist units like HRT).<br><br>Also (Nov 2025) - I have only just realised that the pistol grip cap cover has a spigot moulded into the inside of it that accepts the thread protector so that the armourer can stow the protector there while the weapon is used with the suppressor fitted. Neat!

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• GA

  @gallotwelve · 2 years ago

  You can tell the MP5 is a point of passion for Mr. Jonathan

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• VI

  @vinceely2906 · 2 years ago

  I’ll be amazed if Jonathan didn’t have the Action Man SAS kit as a child.

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• ED

  @eddietat95 · 2 years ago

  <a href="https://www.youtube.com/watch?v=ZBAEsrbcdXE&amp;t=70">1:10</a> The &quot;10-94&quot; date is in reference to the 1994 Federal Assault Weapons Ban signed into law in September and in effect from October onwards (until it expired in 2004). This writing appears on magazines (with more than 10 rounds capacity) destined for the US market during this era to differentiate those mags destined for law enforcement/military from those for the wider civilian market.

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• KE

  @kevo868 · 2 years ago

  FBI agents had these up till around 2016/2017. It was not just limited to HRT. FBI also had 9 MM variants as well.

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• AE

  @AEixilimar · 2 years ago

  I love seeing Jonathan going from this nervousness to talk to the camera with a lot of studders to becoming more and more confident in the way he speaks and presents everything

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• MI

  @michaelathens953 · 2 years ago

  I love MP5s, the only full auto SMG I&apos;ve ever fired was a 9MM MP5 and it was fun as hell. Shockingly easy to control really, I can see why they&apos;re so popular cause if I could handle it that easily with no prior training or experience on it a real operator could really do some work.

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