How Does It Work: Lever Delayed Blowback

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Genre: Education

Family friendly? Yes

Wilson score: 0.9945

Rating: 4.9868 / 5

Engagement: 7.08%

Forgotten Weapons

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Shared July 11, 2019

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Lever-delayed blowback is a relatively uncommon action system, although it is applicable to a wide variety fo firearms and has been successfully used in submachine guns, rifles, and light machine guns. It uses a principle of mechanical disadvantage on a fulcrum lever to force a mass to accelerate rearward while the bolt remains closed. This allows the effective weight of the moving parts to be amplified, resulting in a lighter firearm.

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Admit it Ian, you just wanted to show us your FAMAS.

3 months ago | [YT] | 672


"...only a relatively small number have ever made it into MAS production..."
I see what you did there ;-)

3 months ago | [YT] | 103

Jason Armstrong

Can’t wait for the video on roller delayed blowback

3 months ago | [YT] | 183


Ian, your Famas is filthy! Have you been shooting it a lot? ;)

3 months ago | [YT] | 102

Si_Vis_Pacem Para_Bellum

" How can I show my FAMAS without showing my FAMAS? " 🤔
making video about lever delayed action

3 months ago | [YT] | 12


in french we call this system "inertia amplification" (in AA52 and FAMAS)

3 months ago (edited) | [YT] | 32

Shaggy Shaggio

InRange shoots a match and features another bullpup in several videos

Ian: "I must find a reason to make a video with the Famas..."

Great video! Really loving the "How Does It Work" series. Its nice to get a good clear and simple explanation about how different firearms technologies work.

Cheers! <3

3 months ago | [YT] | 29

Colburn F

I was hoping to see TKB-517 that Ian found in Narnia... I'll get over it, the FAMAS is pretty cool.

3 months ago | [YT] | 54

eric money

I swear the famas bipods look like a couple of ratchets stuck on the side of the gun.

3 months ago | [YT] | 17

Nathan Boulton

once again, another highly informative video. I really can't say it enough, but thank you.

3 months ago | [YT] | 35

Davey J

When I think I know something about guns and then watch an episode of forgotten weapons.

I know nothing

3 months ago | [YT] | 20

Peter Kröger

Only a few have made it into MAS-production...;-)

3 months ago | [YT] | 14

Caleb Dehart

Ian.....please do a Knights Armory Masterkey video! Was mad I couldn't get my hands on one when I was fighting in Afghanistan.

3 months ago | [YT] | 9

Vitor Roma

We need a modern PCC using this.

3 months ago | [YT] | 9

Peter Yi

I've always wanted to know this one, it always confused me hard.

3 months ago | [YT] | 15


I didn’t know I had questions about lever delayed blowback. Now, I have so many.

3 months ago | [YT] | 1

Kyle Glenn

I didn't know that I had questions about lever delayed blowback systems!

3 months ago | [YT] | 1

Ken ibn Anak

Only a handful of guns, but no need to name any of them.. :)

3 months ago | [YT] | 2

Ryan Walden

(Hands Ian some rags and remoil) “here you go buddy” Might clean that a little. Such a dirty dirty video😏

3 months ago | [YT] | 0

Dan Irizary

In my head, I had conflated lever-delayed-blowback and toggle-locked actions, like the luger. Derp.

3 months ago | [YT] | 0