American Rifleman - April 2011 - 62

leupold mArk 8 cqbss
continued from p. 56

indexed brightness settings, so the reticle is never
more than one click away from being off or on the
appropriate brightness setting. The brightness knob
is a large, knurled and grooved turret so you do not
have to fumble around for it. The brightness knob also
serves as a housing for the CR2032 battery that powers the illuminated reticle.
The reticle is in the front focal plane, which means
that as magnification is increased the size of the reticle
will increase proportionately. At first, this appears
to be a surprising choice; second plane reticles are
almost universal among riflescopes made for the
American sporting market. One might think that the
more precise aiming point that a second-plane scope
delivers at higher magnification might provide a useful advantage to a precision marksman; however, the
constant subtension of a first-focal-plane scope and
the ranging ability it provides at any power setting is
far more important to a trained precision marksman
taught to calculate range in mils by observing targets.
The Horus Vision H27 reticle is offered in Mark 8
scopes produced for the military and law enforcement. Leupold's new Marine-Tactical Milling Reticle
(M-TMR) is offered in the Mark 8 for civilian shooting enthusiasts.
The mil-based Horus Vision H27 reticle employs a
two-dimensional grid system that helps enhance both
accuracy and ease of use. It has two thick, horizontal
stadia arms and a fine, 0.5-mil vertical stadia arm
in the lower field of view. The fine grid marks in the
lower half of the field of view do not obscure longrange targets that require a lot of holdover. A fivem.o.a. illuminated dot expands to a donut-style ring
at higher magnification setting. Leupold's M-TMR is
designed to simplify successful range estimation and

target engagement. Its stepped configuration might
be called a triplex reticle. The centermost arms subtend 0.10 mil. Both the horizontal and vertical arms
are indexed with perpendicular hash marks every
0.10 mil. The second set of stadia arms subtend 1 mil
and are indexed every 0.50 mil. The outermost arms
subtend 2.0 mils and are indexed every 0.50 mil as
well. When the illumination knob is turned to one of
the eight "on" positions, only the second set arms are
illuminated.
Given the military use for which the CQBSS was
originally developed, ruggedness and durability were
critical elements of the design. The CQBSS is filled
with an argon/krypton gas blend that helps make the
scope fog-proof and waterproof, having been tested
to 66 ft. of submersion. The Mark 8 has a matte-black
finish and features Leupold's Index Matched Lens
System with DiamondCoat 2, which helps provide
increased light transmission and scratch resistance
that exceeds military specifications.
The BDC ring on my sample scope was set up
for the 5.56x45 mm NATO MK 262 Mod I load, so I
mounted the scope on a FNH-USA SCAR 16S using
tall steel Leupold rings compatible with the gun's
Picatinny top rail. I took it to our test range in order to
familiarize myself with the scope's unique illumination
and magnification controls and get a feel for how the
M-TMR reticle worked indoors.
The thick 2-mil-wide vertical and horizontal arms of
the reticle glow red when illuminated, but the thinnest 1/2-mil thick arms at the center of the reticle do
not glow at all. The large brightness-adjustment turret
produced positive, discernible clicks at every level of
adjustment. I then took the CQBSS to an outdoor range
to see what I could get out of this optic. Since there is
no need for a multi-tool or coin to make the adjustments, the pinch-style, auto-locking windage and
elevation dials greatly simplified the zeroing process.
The adjustment dials are very easy to turn, but when
they are released they lock solidly in place, so there is
no need to worry about them moving when they brush
against gear or obstacles.
After obtaining a solid zero I "shot the square." From
zero, I turned 10 clicks up and 10 clicks right then fired
a five-shot group. I then turned the elevation dial 20
clicks down and fired a second group. After turning
the windage turret 20 clicks left, I fired a third group.
I then turned 20 clicks up before firing a fourth group
and lastly I turned 10 clicks right and 10 clicks down to
return to zero. The scope formed a perfect 6½" by 6½"
square with the last group neatly superimposed on the
first. Thus, the adjustments were clearly positive and
repeatable, but more than that, the clearly marked zero
stops meant there was no "getting lost" in the dial.
continued on p. 88

Standard accessories include a 2½" sunshade and aluminum flip-up lens covers.

58 A

pril

2011

www.AmericAnriflemAn.org


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American Rifleman - April 2011

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