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View Full Version : Is my optic Ready for the Tactical Bathing Environment? The Primary Arms MD-02


Miso Beno
01-17-2010, 02:57 PM
Note: In fairness to the vendor of this product, Primary Arms (http://primaryarms.com/), I would like to inform you that the product used in this review is a blemished product. Since running the first battery of tests we have found out that the 2nd Generation Microdot had improperly drilled mounting holes which resulted in a compromised optical tube. This may (will) skew the test results and we will attempt to repeat this with the Primary Arms 4th Generation Microdot when it becomes available.

Please do not attempt these tests at home. I am a trained amateur and I am performing this in at my own risk. Don't sue us if your product catches on fire, electrocutes you, and strangles your cat while you're attempting to duplicate our tests. This is for entertainment and informational purposes only.

http://misostudios.com/site/wp-content/gallery/dumpgallery/primaryarmsMD02-889.jpg

We're all looking to beat the system and save a few bucks. It's a trait that I find many firearms owners share. Of course when something really cool comes out for a phenomenal price most of us are pretty quick to whip out our pocket books and throw money at the vendor without batting an eye. This often results in us spending more money because we buy more products but who cares? We've got some pretty neat toys.

The Primary Arms Microdot (MD-02 BLEMISHED) (http://primaryarms.com/product.sc?productId=303&categoryId=5) is a case of the leaping into a product before looking, but for $59.00 I'm not feeling much buyers remorse. I bought this knowing that it would have some issues but heck, it comes with a one year warranty and according to The Internet the folks at Primary Arms stand behind their products, even when the product has a known factory defect. I cannot speak for this first hand as I'm not done trying to break mine but I suspect that by the end of the test it'll be something I might want to look into.

When I first ordered the optic I thought "Hey! This would be mighty awesome on my Browning Buckmark!" and of course, it would fit the role perfectly. Then the thought came to mind: What about putting this bad boy on my three-gun shotgun? It's gotta be better than my ten-thousand year old TascoAccudot (http://ruserio.us/images/1/bewbew%20%20339.jpg) (which has served me well--but man it's huge and gets in the way). What isn't there to love? It's a $60 red-dot that has a one-year warranty and is supposed to be superior in quality to products more than twice it's price. (I've been told the next best optic in it's size class is the Aimpoint Micro which is ten times the price).

After hearing all these rumors about how awesome the PA MD-0x series optics are I HAD to give it a run around the block. Of course, by "run around the block" I mean to subject it to environments that any commercial optic might run into. It's not a series of unrelated, outlandish tests AT ALL.

http://misostudios.com/site/wp-content/gallery/dumpgallery/primaryarmsMD02-881.jpg

First Opinions
hen the PA-MD02 arrived I was expecting an chintzy optic floating in a sea of packing packing peanuts. Instead I was greeted with a box, packed with packing paper, protecting a modest black cardboard box containing bubblewrap protecting two small plastic bags. One bag contained a set of hex keys, and the other contained an adorable little optic wearing it's bikini.

The optic feels well made for the most part, though the battery bay cover is kind of annoying. Due to the battery compartment's location its a pain to tighten down the battery cover because the optic's intensity dial just wants to spin. Other than that, the low mount is surprisingly solid, the aluminum body feels durable enough, and the front element sure is pretty. The dot at the brightest setting seemed reasonably bright is very crisp but it seems like it could get washed out on a bright summers day with hard sunlight. Unfortunately, this is the wrong season for me to attempt to find out when the dot becomes hard to see.

I will say that it's no Aimpoint CompM2 but it doesn't have to be. What it does have to be is reasonably robust, and easy to use optic that can withstand the average American household.

TEST #1 - Checking the windage adjustments
The first test of any optic is to check the windage and elevation adjustments from extreme to extreme. I mounted the optic on an AR-57 (http://230grain.com/showthread.php?p=81001) rifle that I just happened to have handy, and removed the caps covering the adjustments. I then grabbed Mr. Flat Head Screwdriver and ran the optic from end to end, feeling every "click" of adjustment and seeing if the reticle moved. I noticed some "dead space" near the extremes on the windage but it still adjusted very consistently in the middle of its range. The elevation adjustments were sharp as a button from bottom to top.

From this initial test, I can say the optic seems like an acceptably well-built piece of equipment, but we won't really know how good it is until I'm done having my way with it.

http://misostudios.com/site/wp-content/gallery/dumpgallery/primaryarmsMD02-890.jpg

TEST #2 - Tactical Shower Engagements
The Primary Arms website advertises the optic as "waterproof." As I have come to learn from inexpensive watches, this carries little weight when it is not paired with a proper depth rating. At best it means it can take a quick dunk or a rainy day; at its worst, the slightest misting will cause the entire thing to rupture and then burst into flames.

I had no intentions of taking the Microdot out diving in the nearest large body of water because I understood what "waterproof" meant for unrated electronics. Instead my test was much much simpler and I think a better simulation of conditions the optic might encounter in the average American household. Although only a few Americans sport dive, most will take at least one shower in their lives. So, through elementary logic, I was able to deduce that an optic designed for the American market had better be prepared for the adverse conditions in the average American bathroom. The test was simple: Take the Microdot in the shower next time I found it necessary to wash myself. (This took careful planning and consideration lest I interrupt my delicate monthly shower cycle).

For a grueling 15 minutes, I endured a hot shower with the Microdot sitting in the direct stream of water while in the ON position. It experienced no harsh agitation, no abrasion, and nothing terribly harsh besides the water, the soap, and the view of the grotesquely unpigmented skin of my buttocks. For 14 minutes the optic seemed to withstand the torrent of grey water and I was ready to declare it shower-resistant. But in the final minute, just as I was readying my camera, I noticed that the inside of the Microdot was wet. It was still chugging along but the tube was compromised.

Further investigation revealed that the water entered through the screw holes on the bottom of the tube, which Primary Arms had mentioned on a different website as the justification for the optic's clearance pricing. However, the tube seals weren't the only compromised area. The battery bay also had water in it, despite the fact that I made sure all of the external accesses were factory-tight. I was a little disappointed in this failure of the optic but I will continue with the tests as soon as it finishes drying out in a 20-pound bag of rice.

http://misostudios.com/site/wp-content/gallery/dumpgallery/primaryarmsMD02-892.jpg
http://misostudios.com/site/wp-content/gallery/dumpgallery/primaryarmsMD02-891.jpg

Miso Beno
01-17-2010, 03:31 PM
TEST #3 - Urban Baking Environment (AKA: Operation Fishstick)
The next section of our very scientific device involves baking the optic at (around) 200 Degrees Fahrenheit (93.333C). Of course I left the infrared thermometer at the little lady's house so I'm going to make up for precise measurements by leaving blind faith to the oven's thermometer and letting it cook with some fish sticks for 20 minutes at ~ 200 Degrees for. (Note, I'm actually just warming them, they're precooked so in reality the device will be around 200 degrees for ~10 minutes or so)

Now I have no intention of setting the fish sticks on fire and I have no idea what the operating temperature, or base chemistry included lithium battery is so I took care to remove the battery and any rubber seals. Seriously who wants to eat fish sticks that taste like burnt rubber. That would be like trying to eat my Glock, and I don't want to eat my Glock or burnt rubber flavored fish sticks.

http://misostudios.com/site/wp-content/gallery/dumpgallery/cookingwithprimaryarms1.jpg
http://misostudios.com/site/wp-content/gallery/dumpgallery/cookingwithprimaryarms2.jpg
http://misostudios.com/site/wp-content/gallery/dumpgallery/cookingwithprimaryarms21.jpg
I may have become bored.
http://misostudios.com/site/wp-content/gallery/dumpgallery/cookingwithprimaryarms22.jpg
Mmm. Mmm. Sure looks good, don't it?
http://misostudios.com/site/wp-content/gallery/dumpgallery/cookingwithprimaryarms23.jpg
It would seem leaving the battery bay cap off was a poor idea.

After allowing the optic to cool and after removing the cheese residue I replaced the O-rings and caps. I also checked the adjustments as best as I could without sending ammunition down range. The optic turned on as normal, though there was still cheese residue on the lens which smudged everything out. Even the turrets turned and felt the same as the day I received the optic in the mail and appeared to adjust smoothly. Now to throw this bad boy in the freezer overnight.

TEST #4 - Arctic Recon
Our cold weather simulator attempts to demonstrate how the Primary Arms Microdot might perform in adverse winter combat conditions. The optic remained in a popular frozen confection to help transmit heat away from the optic and generally aid in cooling. It was then set to cool for 12 hours but I forgot about it last night so it was left in the chiller for a 45.25 hours, with the battery installed this time.

http://ruserio.us/images/1/ArcticWarfare0.jpg
I like it in my instant coffee when I'm feeling decedent. (01/27/2010 0214)

http://misostudios.com/site/wp-content/gallery/dumpgallery/Coowhip5.jpg
http://misostudios.com/site/wp-content/gallery/dumpgallery/Coowhip4.jpg
http://misostudios.com/site/wp-content/gallery/dumpgallery/Coowhipdot.jpg
Yup, still turns on. (1/28/2010 2331)

http://misostudios.com/site/wp-content/gallery/dumpgallery/Coowhip3.jpg
I'm surprised it didn't flood when I rinsed it off. I did find what looks like frozen confection infiltration around the rim of the rear lens. More on that later.

I ran it through the standard fiddly battery of tests and it still seemed to function. There's just one last stress test before I find out if it will hold a zero.


TEST #5 - Shotgun Wedding
http://misostudios.com/site/wp-content/gallery/dumpgallery/Coowhip2.jpg
http://misostudios.com/site/wp-content/gallery/dumpgallery/Coowhip1.jpg

What do I need to say? I dumped it on one of the most punishing shotguns on the planet, ran 20 rounds through it and it still worked. Maybe next time I'll put it on a gun with a slug barrel and find out how viable it is as a shotgun optic.

TEST #6 Adjustment Check, and Zeroing
After abusing the heck out of the optic it was time to see if it still did it's job. I drug out MR. AR-57 and ran 50 rounds through it. It held a group that was similar to the groups I produced with the EoTech XPS2-2 which, of course I forgot to take photographs of. At 50y even with the water spots from the weather proofing test I was able to hold my groups within 4" using the sub optimally loaded SS195LF ammunition. Even a few (light) whacks with my AK-47 calibration device (rubber mallet) didn't phase the optic.


Conclusion -
Of course, the week after I completed the Primary Arms MD-02 test, Primary Arms sold out of the Micro Dot Gen 2 and the Micro Dot Gen 3. That said, they have come out with a BRAND NEW Micro Dot, and are referring to it as the Gen 1. The new Micro Dot addresses the water infiltration issue that the original Micro Dot line had by making the base an integral part of the optic. By removing the screw holes drilled into the tube the entire body should, at least in theory, remain weather resistant.

At $79.00 the Primary Arms Micro Dot 01 (http://primaryarms.com/product.sc?productId=402&categoryId=5) looks like an extremely tempting unit; particularly if its as robust as the Micro Dot Gen 2 that I abused the heck out of.


Test 1 Conclusion: The Initial Adjustment Check appears acceptable. (IAC Pass)
Test 2 Conclusion: Optic is not ready for Tactical Bathroom Engagements. (TBE Fail)
Test 3 Conclusion: Optic can handle the rigors of a Urban Baking Environment. (UBE Pass)
Test 4 Conclusion: Optic is ready for Cold Weather Applications (CWA Pass)
Test 5 Conclusion: Survived the Remington 11.
Test 6 Conclusion: Held Zero after Remington 11 on an AR-57

Clinotus
01-28-2010, 10:41 PM
TEST #3 - Urban Baking Environment (AKA: Operation Fishstick)
http://ruserio.us/images/1/cookingwithprimaryarms22.jpg]


I am loving this test! Also as an aside the image I quoted made me a but hungry. I had a can of Ravioli. Was not disappointed with the childhood memories. I need to tactical-ize my findings somehow. The bar has been raised. :idea:

Gooch
02-07-2010, 02:12 PM
Nice, but how does it shoot Miso?

Miso Beno
02-07-2010, 02:20 PM
Nice, but how does it shoot Miso?

I had some technical difficulties with the host shotgun. I should be able to complete the test pretty soon though.

Gooch
02-08-2010, 02:57 PM
Cool, I'm interested in the results.

Miso Beno
03-23-2010, 05:59 AM
Finally I finished this guy. Just in time for Primary Arms to start selling their PA Micro Dot Gen 1 (http://primaryarms.com/product.sc?productId=402&categoryId=5) they're also reporting that they will have updated versions of the Gen 2 and 3 with the water infiltration issue resolved. Ill see what I can do to get my hands on one of those for an updated review. Next time I think I'll use dinosaur nuggets and cheddar instead.

Danube
03-24-2010, 10:06 AM
Pictures are not loading for me.

Miso Beno
03-24-2010, 03:51 PM
Pictures are not loading for me.

I just rehosted the photos on a separate server since ruserio.us decided to stop resolving for half of the homes in America.

MrTwigg
03-24-2010, 04:48 PM
I missed this earlier.

Now I have a longing for fish sticks with cheese for some reason... :tongue:

Comprehensive, entertaining and informative.

Well done ! :clap:

powers
04-28-2010, 07:47 AM
Hate to bump an old thread, but did you guys do any kind of a battery life test? I know most of the micro red dots run forever.

Miso Beno
04-28-2010, 10:18 AM
Hate to bump an old thread, but did you guys do any kind of a battery life test? I know most of the micro red dots run forever.

I had planned to run a formal battery test but I accidentally left it on over night and forgot about it until the next day. A few times. (Its still running.)

powers
04-28-2010, 11:08 AM
I had planned to run a formal battery test but I accidentally left it on over night and forgot about it until the next day. A few times. (Its still running.)

I went ahead and submitted it to primary arms and they ballparked 250 hours as the operational time. Roughly 10 days continuous on. I'll run a battery test when my gen 3 comes in.

powers
04-29-2010, 01:23 PM
sorry for the double post but:
1.) I just found out that Primary Arms is in the Houston area, and so am I.
2.) I ordered the Gen3 dot with KillFlash. It'll get here on monday. I'm going to run this thing into the ground.

Miso Beno
04-29-2010, 02:58 PM
sorry for the double post but:
1.) I just found out that Primary Arms is in the Houston area, and so am I.
2.) I ordered the Gen3 dot with KillFlash. It'll get here on monday. I'm going to run this thing into the ground.
As far as I know, Gen3 and the Gen2 have the same electronics package but you have a fancy shmancy kill flash hanging off of the front of yours.

Danube
04-29-2010, 03:38 PM
sorry for the double post but:
1.) i just found out that primary arms is in the houston area, and so am i.
2.) i ordered the gen3 dot with killflash. It'll get here on monday. I'm going to run this thing into the ground.

field test!

Miso Beno
04-30-2010, 12:55 PM
field test!

I would field test mine but I kinda forgot it at the Mega Machine Shop guy's shop. :freak:

Atticus_1354
05-02-2010, 10:36 PM
I am going to be picking up a gen 2 and putting it on my mossberg 500. It will be used for dusk coyote hunting and I will be beating it up pretty bad. Field report to come at a later date.

Miso Beno
07-26-2010, 05:12 PM
The folks at Primary Arms were kind enough to send me a MD-04 as a replacement for the water damaged MD-02. I plan on redoing the water portions of the test and then performing a long term endurance study with the optic mounted on a Daniel Defense offset mount.