Main Arms despatched me the SLx MD-21 for analysis, a cast T2 sample crimson dot that is available in below $200.
Looks like solely fifteen years in the past, something past irons meant spending rifle cash on an optic.
Now the market’s flooded with glass at each value level, and Main Arms has carved a distinct segment by providing feature-rich choices that keep inexpensive.
The MD-21 incorporates a 2-MOA dot, twelve brightness settings, and AutoLive movement activation. As a substitute of conventional capped turrets, it makes use of recessed uncovered changes set into the cast housing.
The 21 mm goal is simply a millimeter bigger than the normal micro dots, however that further area and a sleeker housing make the window really feel noticeably much less cramped.
At 3.8 oz naked, it’s 0.2 oz heavier than a Vortex Crossfire II. ACOG house owners will know what I imply; nothing beats the texture of a dense, cast housing in hand.
The T2 footprint means the sky’s the restrict for mounting choices. Main Arms consists of an absolute co-witness mount, a 1/3 co-witness mount, and even a shim plate for fine-tuning peak and fitment.
I selected to run it as a 12 o’clock crimson dot on my SLx 1-6 Nova. Matching optics simply look proper, and the MD-21’s window sits decrease in its footprint than comparable Holosun or Vortex fashions.
In a sea of positives, brightness is its Achilles’ heel. Even at max setting, the dot struggles in daylight. The connected picture was taken within the shade at full brightness, and to my eye, it was barely seen.
Not being daylight vivid, paired with a barely bigger footprint and additional weight, retains the MD-21 on high dot responsibility. It feels rugged, well-built, and inexpensive, however brightness may make or break whether or not this one earns a everlasting slot in your rifle.
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