Gun Gear

Comparing Inexpensive Red Dot Sights

Red dot sights on a shooting target with a Ruger rimfire pistol

Back in 1975, Aimpoint offered the first commercial red dot sight. Those initial sights were heavy, and good luck trying to find a replacement battery. Today, red dots are lighter and use batteries sold at convenience stores and gas stations, and as the weight decreased, so did the price.

Red dot sights on a shooting target with a Ruger rimfire pistol
The red dots we tested were, clockwise from top, the Bushnell TRS-25, Tasco BKRD30, BSA Model RD30, and the NcStar DBB130. The test gun was a Ruger 22/45 shot with Remington Thunderbolt .22 LR ammunition.

For the price of a state-of-the-art Aimpoint purchased in the 1980s, you could buy eight $50 red dot sights today. The question many of us have is, how good are these inexpensive red dots? To see for myself, I compared three sights costing under $50—BSA Model RD30 ($19.99), NcStar DBB130 ($28.35) and the Tasco BKRD30 ($30.30). In addition, I added a potential ringer—a Bushnell TRS-25 ($80.72) that cost nearly double the other sights, but is still affordable for most budgets.

Before starting any range work, I shock-tested the sights by dropping them on a wood floor from a height of four feet. Red dots tout their sturdiness for use on rifles, shotguns, and magnum revolvers and I thought this was a useful test. The jolt had no effect on the sights; dots remained illuminated and knobs turned.

Next on the torture test, the dots were activated with the turret covers left on and frozen at -4° F, then soaked in hot water. Some of the instruction manuals stated the battery and turret caps need to be secured when using the sights in “extreme conditions,” which translates into different meaning depending if you are a plinker or turkey hunter.

Close up view of the green-tinted lens on a red dot sight
A coating on the lenses of these optics creates a green tint that’s visible. The coating helps reflect the red dot within the sight body.

I followed the instruction manuals and left the turret caps on. All the sights had some type of pliable gasket on the turrets to seal out dust and moisture. So, too, did the battery compartments. There were no hiccups from the cold. In the water, all the sights released a few air bubbles from the rheostat knob, but again no hiccups. Dots remained illuminated, and I saw no sign of moisture.

Red dots are manufactured with a coating on the lens that creates a green tint when viewing. The coating helps reflect the red dot within the sight body. The green tint was slightly more pronounced on the NcStar. Also, a slight blueish ring can be seen around the edge of the lens. Neither of these impacted the use of the sight, since the green tint was subtle. The sight is also not designed for observation like spotting scopes and binoculars nor like riflescopes.

To my eyes, the brightest of the sights are the most expensive—the Bushnell, followed by the Tasco. The BSA and NcStar tied. I tried to coax parallax from all four sights, but could not. Moving my head left/right and up/down, the dots stayed on target.

All the sights use a knob to activate and adjust the red-dot intensity. The BSA, Tasco and NcStar knob is located on top of the sight; the Bushnell’s is at a 45-degree angle between the top and right side. The knobs take effort to turn, with the BSA knob rotating the easiest; the Bushnell requires the most effort. The knobs also house the battery. With the Tasco and Bushnell, you can use a coin to tighten the cover, and that is a good practice because with the Bushnell, I accidentally loosened the battery cover when turning and adjusting the dot. The NcStar’s battery cover has a ridged edge, and it loosened as I rotated the knob.

The sights have 11 intensity levels, except for the NcStar’s, which has seven. For viewing, I dialed in all the sights to the seven setting for consistency, and when tested in bright sunlight, all of the dots were clear points of red that were easy to place on target. In the dark, the dots seemed a bit fuzzier. At the highest setting, all the sights produced a signature from the objective end downrange.

Black red dot sight from BSA
The BSA RD30 comes in a matte-black finish and includes a Picatinny mount.

The sights then took their turn being mounted on a Ruger 22/45 for range testing. All use a Picatinny rail or Weaver-style base for mounting. The NcStar and BSA both have one-mount clamping that is adjustable. The Tasco’s mounts are fixed. The Bushnell has only one mounting clamp. All clamps are tightened with a flat screwdriver or coin; only the Bushnell requires a hex wrench, which is supplied with the sight.

These sights are made to be zeroed and left alone, but I cranked the windage and elevation while noting the number of clicks and returning to zero. I looked at each sight’s ability to pick up the dot with both eyes opened, consistency shot after shot, and ease of use.

The BSA RD30 with its larger objective, like the NcStar and Tasco, is easy to use with both eyes open. I felt the BSA and Tasco tied for ease of use and lightweight. The BSA gave the pistol good balance and offered fast follow-up ability.

The NcStar is the heaviest sight tested. If you are a precision shooter, you will like it because it helps steady the pistol. The NcStar’s weight was noticeable when mounted on a pistol, and it might be better suited for use on a rimfire rifle or on a shotgun for turkey hunting. The clear flip-up covers look like they would scratch easily, but the covers keep out dust, dirt and other assorted crud. I prefer to use the sight with the clear lens covers flipped up.

The Tasco definitely made me happy. Its controls were not too difficult or easy to turn, and the larger objective made two-eye aiming simple.

The ringer in the test was the Bushnell TRS-25, which is tiny in size and weight compared to the other red dots. The smaller objective and smaller dot are slightly harder to use until I acclimated to them. For younger or less experienced shooters, I would choose a sight with the larger objective diameter with the larger 5-MOA dot. I like that it uses only one mounting clamp that is easier to affix, affording it more mounting options. If small size matters, then the Bushnell is a good choice.

BSA RD30 NcStar DBB130 Tasco BKRD30 Bushnell TRS-25
Price $19.99 $27.23 $30.30 $80.72
Length 3.8” 3.6” 3.8” 2.4”
Objective Diameter 30mm 30mm 30mm 25mm
Reticle 5 MOA red dot 3 MOA red dot 5 MOA red dot 3 MOA red dot
Magnification 1x 1x 1x 1x
Parallax Setting 50 yds. 50 yds. 50 yds. 50 yds.
Weight 5 oz. 6.8 oz. 6 oz. 3.7 oz.
Eye Relief Unlimited Unlimited Unlimited Unlimited
Click Value at 100 Yards 0.5” 1 MOA 1 MOA 0.5”
Activation Knob Knob Knob Knob
Dot Intensity Settings 11 7 11 11
Power Source 1 #CR2032 1 #CR2032 1 #CR2032 1 #CR2032
Battery Life at Medium Intensity 8 hours 8 hours 8 hours 8 hours
Housing Polymer Aluminum Aluminum Aluminum
Finish Matte black Matte black Matte black Matte black
Weather Resistance Waterproof and fogproof Waterproof and fogproof Waterproof and fogproof Waterproof and fogproof
Automatic Shut Off No No No No
Warranty 1 year limited Limited lifetime 1 year limited 2 year limited

 The red dots we tested were the Bushnell TRS-25, Tasco BKRD30, BSA Model RD30, and the NcStar DBB130. The test gun was a Ruger 22/45 shot with Remington Thunderbolt .22 LR ammunition.


Robert Sadowski has written about firearms and hunting for nearly 15 years. He’s authored four gun books and edited three and is a contributor to numerous gun-enthusiast magazines, including Combat Handguns, Black Guns, Tactical Weapons for Military and Police, Gun Tests, Personal and Home Defense, Gun Hunter, SHOT Business, and others. He has a personal affinity for large-caliber revolvers and the AR platform.


Out of the four red dots tested do you want to try? Tell us which one and why in the comment section.



The Mission of Cheaper Than Dirt!'s blog. "The Shooter's Log", is to provide information - not opinions - to our customers and the shooting community. We want you, our readers, to be able to make informed decicions. The information provided here does not represent the views of Cheaper Than Dirt!

Comments (45)

  1. I recall that not too long ago I read that the military was not going to put open sights on battle rifles. As I read about battery failures and breakage, I wonder if this was a good decision. I am 71 years old, had my glasses set for 28″ and have no problem seeing the front sight, although I am not quite as quick and accurate as when I was younger. Well, it is better to be shooting than sitting at a computer all day.

  2. The Bushnell TRS-25 is the one I would like to try. According to Bushnell all their red dots have been tested to work on a 44 mag. pistol. That is the pistol I want to put a red dot on.

    1. As are you….simply put, my posts are informational….ie… Batteries are unacceptable and MOA is unacceptable…for individuals unlike you, that care about dependability and accuracy.

  3. I really can’t believe what I am reading here. I posted earlier that I have no desire to own a scope of any kind that doesn’t function on it’s own (no batteries). Now I am seeing many post on accuracy…3,4,5 moa at 100yds… that is ludicrous. No wonder many post advocate much higher rifle calibers than are needed to drop game. If “Any” scope cannot attain 1moa or better, I am certainly not interested.

    1. Your point is off base. The items under discussion are not “scopes.” They are sights. They are meant to replace iron sights, no more or less, i.e., they are much easier for older eyes to see through. They will be as accurate as iron sights and you should not expect any sub-moa groups, any more than you would with iron.

    2. All of my rifles save one and all of my handguns are ironsited. I am a NBA certified expert with my 45acp.and my M1A. Ones focus is on the tip of the front site blade. If the shooter cannot see that far then, as many of my fellow shooters have done is to purchase eye ware the focuses their vision at the proper distance for the front site blade. As in my original post…if the site cannot function on it own (no batteries) then it could fail at a critical time to disastrous results.
      Technology is grand but plane know how is better.

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