In 2019 the US Army selected the SIG Tango6T as the optic for their HK Designated Marksmen Rifles and for use by Special Forces. The model I tested is the civilian version, differing in its markings but effectively identical to the Army version. I have read conflicting articles stating that the DMR rifles is an SFP version of the Tango6T but I can not confirm this. Of the two Tango6T samples I tested, one lent to me by Monstrum Tactical and another was the personal optic of a friend in law enforcement.

The Tango6T is finally built with subtle body details that speak to extra time milling. The Tango6T has an Flat Dark Earth (FDE)/burnt bronze flat anodized finish specified by the Army. Its control surfaces have fine diamond checkering pattern for grip.

The scope came pre-installed on a SIG Alpha4, a high quality cantilever mount with convenient printed torque specs. Contrary to internet scuttlebutt, the Alpha4 is not a Geiselle mount (though superficially similar in look). The Alpha4 was designed by SIG for the Tango6T, fabricated in California and assembled at SIG’s factory in Oregon.

I had an opportunity to compare the newest model of this LPVO to a pre-DOD selection model of this optic. Superficially it appears identical save for a slightly darker shade of FDE which appears more burnt than bronze. After contacting the folks at SIG, they were very helpful in giving a historic background on the various versions of this LPVO. There are a number of configurations available from SIG, the current Mil and civilian reticle is the Hellfire DWLR-556 reticle.

The Tango6T has 11 levels of brightness on its illumination, 9 visible settings and 2 which are night vision compatible. It has a unique illuminator locking ring on which prevents the knob for changing or turning on or changing setting when engaged. The reticle appeared daylight bright though not quite the “red dot bright” intensity found on the Nightforce ATACR or Vortex RAzor. The unit is powered by a common CR2032 coin battery.

It has capped turrets which are wide diameter but low profile; the down side is that the area only allows for small font numbers which may be hard to read for some folks. Each click is 0.2MIL and is audible and tactile positive so you can infer your changes by click feel if you can’t do so visually.

The Tango6T’s DWLR6 is a BDC design with a Christmas tree of holdovers for long range shooting beyond 500yrds. As with most FFP LPVO’s the 1x seems to be an afterthought, feeling a bit too thin and easily lost against a dark or complicated background. The bright illumination makes up for this. It’s central horse shoe of death is intensely illuminated with a slight outline on the rest of the stadia elements.

Optically the LPVO had excellent brightness, and clarity. Even though it had noticeable chromatic aberration, I was still able to resolve detail at 6x that would only see in LPVOs that were 10x. At 1x the image was flat and much better than Razor or Riton FFP LPVO’s I’ve tested. This scope is world’s better than SIG’s similarly named Tango MSR 1-10x LPVO which I was underwhelmed by a few months ago. Save for it’s thin 1x reticle this is one of the best LPVO’s I’ve tested.



Optics Planet:


@50yrs: Element 1 / Group -1


Focal Plane First
Magnification 1-6x
Objective Lens Diameter 24 mm
Reticle DWLR-556
Adjustment Increments 0.2 MRAD
Weight 22.1 oz.
Maintube Diameter 30 mm
Travel Per Rotation 20 MRAD
Parallax Setting 300 m
Field of View High/Low (@100yds) 105.8/17.7 ft.
Eye Relief High/Low 4.1/3.9 in.
Exit Pupil High/Low 11.4/4.0 mm
Diopter Adjustment Range +/- 2.5
Waterproofing IPX 8
Ocular (Rear) Outer Diameter 1.81 in (46mm)
Objective (Front) Outer Diameter 1.18 in (30mm)
Internal Gas Purge Argon
Illumination Settings 9 Daylight/2 NV
Total Elevation Travel 31 MRAD
Total Windage Travel 31 MRAD
Battery (1) CR2032
Illumination Red