this post was submitted on 13 Nov 2024
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No Stupid Questions

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Like, could you make a smaller version of a 1911 that fires 22lr instead of .45 by just scaling all the parts to the 22lr?

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[–] deegeese@sopuli.xyz 26 points 1 year ago (1 children)

Short answer no, not everything scales linearly.

You’d have 1/8th the powder charge in a chamber with 1/8th the volume, encased by a barrel 1/2 as thick to contain the same pressure as the full size one.

[–] neidu3@sh.itjust.works 11 points 1 year ago

Yup, square cube law applies here as well.

[–] partial_accumen@lemmy.world 14 points 1 year ago (1 children)

If you're talking about actually scaling, like a CAD drawing, then no.

If you're talking most of the appearance and function, then yes! There is a scale model of a Browning M2 machine gun (which normally fires 50 cal ammo) that fires 22lr instead. It will set you back about $20,000.

[–] Postmortal_Pop@lemmy.world 3 points 1 year ago (2 children)

I'm mostly thinking appearance and function, I recognize that rim fire 22lr is absolutely not going to work in a center fire without some sort of conversion.

[–] partial_accumen@lemmy.world 2 points 1 year ago

There is a whole youtube rabbit hole you can go down showing videos of miniature versions of larger (larger caliber) guns. The smallest I saw was "replica" Civil War Navy revolver that the whole gun was about 6cm long. It was a functional gun that had a powder charge with a projectile.

[–] Dorkyd68@lemmy.world 2 points 1 year ago

If you're only after appearance and function then there are plenty of 1911 .22lr or just .22 out there. They look almost exactly like a 1911, yet only fire 22

[–] mlfh@lemmy.sdf.org 7 points 1 year ago

More changes would be needed than direct uniform scaling - .22lr is rimfire, whereas .45acp is centerfire, for example, and their aspect ratios are different. The mass and strength of uniformly scaled-down parts also might not match the recoil and pressure provided by the smaller round, and might result in failure to reliably cycle the action or the gun bursting if the mismatch is too much.

[–] NeoNachtwaechter@lemmy.world 6 points 1 year ago (1 children)

all the parts

Your finger remains the same. Do you really want a half size trigger?

[–] Postmortal_Pop@lemmy.world 8 points 1 year ago

I'll have you know I have the daintiest hands. Lol

[–] Snailpope@lemmy.world 1 points 1 year ago

Browning makes a 1911 in .380, it's an 80% scale of a .45 1911.