Aimpoint M5 Scalar Works 1.93 (lower third) mount magnifier?

[Willard]

Anyone know what mount would be compatible with the Scalar Works 1.93 set up for the Aimpoint Magnifier 3X or 6X? Thanks.

[dontshakepandas]

Any reason not to go with the Scalarworks mount?

Also, 1.93 is higher than lower 1/3. 1.57 is lower 1/3 height.

[Willard]

Any reason not to go with the Scalarworks mount?

Also, 1.93 is higher than lower 1/3. 1.57 is lower 1/3 height.

Thanks. I think that came across garbled. I just ordered the 1.93 mount / Comp M5 combo (missed signature from USPS so gotta chase that now). Was considering adding a magnifier but don't see that as an option for Scalarworks. Going with another vendor and playing mix and match concerned me that something may not line up.

[dontshakepandas]

Scalarworks does have a magnifier mount. I haven’t personally used it and it’s relatively new so I haven’t seen much about it, but based on the other products I’ve used from them I’d think it’s your best bet.

https://scalarworks.com/shop/quick-detach-mounts/leap-06/

I really like the Unity Tactical FAST Mounts since the magnifier flips down instead of to the side, but it isn’t compatible with the Scalarworks mount you have.

[Willard]

Perfect. Thanks my friend. I completely missed that.

[CWE]

I have found that my 1.93" mounted red dots to work fine with my lower 1/3 Eotech G33 magnifier. The small amount of difference in height doesn't seem to be an issue when looking through the magnifier.

[Alpha Sierra]

1.57 is lower 1/3 height.

All my rifle RDS mounts have been Larue lower 1/3. They are all 1.69" from top of rail to the optical centerline.

[javemtr]

Scalarworks mounts come in three heights: 1.42", 1.57", 1.93". They consider the 1.42" to be absolute co-witness and the 1.57" to be lower third.

[Alpha Sierra]

Scalarworks mounts come in three heights: 1.42", 1.57", 1.93". They consider the 1.42" to be absolute co-witness and the 1.57" to be lower third.

They're either measuring from a different datum than everyone else (Larue, MI, Bobro, etc, etc) or their idea of lower 1/3 is different than everyone elses and much closer to absolute.

[javemtr]

Unfortunately these measurements don't seem to be standardized.

Spuhr Micro mounts as an additional data point:
Absolute co-witness: 38mm / 1.50"
Lower third: 42mm / 1.65"

For Aimpoint's mounts, their absolute co-witness is at 39mm / 1.54"

[texasaggie2005]

Unfortunately these measurements don't seem to be standardized.

They aren't, as "lower 1/3" isn't a standardized height.

A couple more data points;

Geissele absolute: 1.41"
Geissele lower 1/3: 1.54"

Trijicon absolute: 1.53"
Trijicon lower 1/3: 1.66"

[javemtr]

They aren't, as "lower 1/3" isn't a standardized height.
That part I can understand. But why can different manufacturers not even agree on what absolute co-witness is? Shouldn't this be defined clearly by some AR-15 technical spec?

Scalarworks: 36 mm
Aimpoint: 39 mm
Spuhr: 38 mm
Geissele: 36 mm
Trijicon absolute: 39 mm

[dontshakepandas]

That part I can understand. But why can different manufacturers not even agree on what absolute co-witness is? Shouldn't this be defined clearly by some AR-15 technical spec?

Scalarworks: 36 mm
Aimpoint: 39 mm
Spuhr: 38 mm
Geissele: 36 mm
Trijicon absolute: 39 mm

Nope, which is the reason this thread exists in the first place. It makes it a real pain to try to mix and match mounts from different manufacturers.

[texasaggie2005]

Firearms community isn't exempt;



https://imgs.xkcd.com/comics/standards.png