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7/23/2026 11:24:05 AM EDT
[Last Edit: Copper][Edited]
Has anybody tried modifying the selector levers on an arc fire V2 to work with a Leber V2 lower in an MP5? I know AS Designs is busy working on their ARHK and I'm definitely going to get one of those when available. I also know that prototytpe Leber V2 ARC Fire 4590 selectors exists, because I've seen a set on instagram here:
https://x.com/s3igu2
My question is, has anybody tried to mod the standard arcfire levers or the optional 416 style selectors to work in a Leber V2 lower? I'd like to put a 45-90 degree arc fire V2 in a Leber lower.
7/23/2026 9:24:33 PM EDT
[Last Edit: krdt][Edited] [#1]
You can use a standard Arcfire V2 in a Leber V2 lower. There are Leber V2s specifically for Arcfires, and from what I understand, you might even be able to make a pushbutton SS-style Leber V2s work with an Arcfire -- although you would likely need to use a non-ambi or remove the right side selector (not 100% it's doable, but I vaguely remember someone saying they'd made it work).

Either way, you don't need to modify the levers; you just need a Leber V2 designed for an Arcfire.



Leber V2 selector version for reference.

ETA: The issue isn't so much with the levers; the issue is with the width of the safety drum. An HK width lower is a good bit wider than an AR lower. I guess they intend to make the cam actuation piece longer in order to accommodate an HK width with the planned Leber-specific levers? I'm not sure. I don't think it would be practical to try to home-modify the levers to work with a full HK width. I'd either get the Arcfire-specific Leber V2 or wait on ASD to release the levers.
Practice, the master of all things. - Augustus
IG: @cqbr.kurdt
Looking for: Savannah Mk18 RIS II in light blonde/bronze - LMT SOPMOD Gen 1 Tan - Aimpoint Comp M3 w/ Lens Covers
7/23/2026 10:51:43 PM EDT
[Last Edit: StealthyBlagga][Edited] [#2]
Quote History
Originally Posted By krdt:
You can use a standard Arcfire V2 in a Leber V2 lower. There are Leber V2s specifically for Arcfires, and from what I understand, you might even be able to make a pushbutton SS-style Leber V2s work with an Arcfire -- although you would likely need to use a non-ambi or remove the right side selector (not 100% it's doable, but I vaguely remember someone saying they'd made it work).

Either way, you don't need to modify the levers; you just need a Leber V2 designed for an Arcfire.

https://i.imgur.com/iGGHuQJ.jpeg

Leber V2 selector version for reference.

ETA: The issue isn't so much with the levers; the issue is with the width of the safety drum. An HK width lower is a good bit wider than an AR lower. I guess they intend to make the cam actuation piece longer in order to accommodate an HK width with the planned Leber-specific levers? I'm not sure. I don't think it would be practical to try to home-modify the levers to work with a full HK width. I'd either get the Arcfire-specific Leber V2 or wait on ASD to release the levers.
View Quote



The selector in your photo looks like an Atrius or MARC
7/23/2026 10:56:59 PM EDT
[#3]
Quote History
Originally Posted By StealthyBlagga:



The selector in your photo looks like an Atrius or MARC
View Quote View All Quotes
View All Quotes
Quote History
Originally Posted By StealthyBlagga:
Originally Posted By krdt:
You can use a standard Arcfire V2 in a Leber V2 lower. There are Leber V2s specifically for Arcfires, and from what I understand, you might even be able to make a pushbutton SS-style Leber V2s work with an Arcfire -- although you would likely need to use a non-ambi or remove the right side selector (not 100% it's doable, but I vaguely remember someone saying they'd made it work).

Either way, you don't need to modify the levers; you just need a Leber V2 designed for an Arcfire.

https://i.imgur.com/iGGHuQJ.jpeg

Leber V2 selector version for reference.

ETA: The issue isn't so much with the levers; the issue is with the width of the safety drum. An HK width lower is a good bit wider than an AR lower. I guess they intend to make the cam actuation piece longer in order to accommodate an HK width with the planned Leber-specific levers? I'm not sure. I don't think it would be practical to try to home-modify the levers to work with a full HK width. I'd either get the Arcfire-specific Leber V2 or wait on ASD to release the levers.



The selector in your photo looks like an Atrius or MARC

I was gonna say it looks like an Atrius, but I didn't know if that was just a thing for MP5s... I don't own an MP5 yet.
It was not preached to the crowd,
It was not taught by the State.
No man spoke it aloud,
When the English began to hate.
7/23/2026 11:35:37 PM EDT
[#4]
I know about the Leber lowers with the safety cutout area but I hate the look and I already have a lower. I think the prototype levers I'd like to duplicate simply have a bend to stick out a little from the side of the lower. It shouldn't be that tough to do, but maybe I'm wrong.
https://imgur.com/gallery/arcfire-leber-v2-levers-6nQ2BAU
7/24/2026 12:36:27 AM EDT
[#5]
Quote History
Originally Posted By StealthyBlagga:



The selector in your photo looks like an Atrius or MARC
View Quote


It'll work with an Atrius, MARC, or Arcfire. Or standard milspec safety; whatever you want to use.
Practice, the master of all things. - Augustus
IG: @cqbr.kurdt
Looking for: Savannah Mk18 RIS II in light blonde/bronze - LMT SOPMOD Gen 1 Tan - Aimpoint Comp M3 w/ Lens Covers

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