Magpul MBUS Pro Steel Back Up Sights Review

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plouffedaddy

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Lots of gun owners aren't a fan of polymer; bottom line. The merits of that mindset can be debated for days without reaching a conclusion but the fact remains. Magpul has released a set of all steel back up iron sights to satisfy the desires of those steel-loving devotees. Here's what I've found so far with them....

Pros:
-Priced lower than comparable competitors steel back up sights. MSRP is $105 for the rear, $85 for the front.
-They have a melonited surface finish treatment that hardens them for durability and also provides corrosion resistance.
-All adjustments can be made without tools but the likelihood of them being accidently moved is low in my opinion (see the video for a demonstration of why)
-Very slim and sleek design but they're still standard AR height.
-Front sight is a great option for those with a railed gas block.
-Can be mounted on any 1913/STANAG rail.
-Rear sight is 1.8oz, front sight is 1.5 oz.
-Dual apertures on the rear.
-Serrations around the rear aperture and on the sides of the front sight reduce the likelihood of glare impacting your sight picture when shooting in bright sunlight.
-Magpul is a company that stands behind their products and you can be sure great CS will be there if you ever need it.

Cons:
-Cost. $190 is a tough pill to swallow when many of us have never had the slightest issue with our MBUS Gen2s.
-They're MIM. I don't mind this but I know lots of folks do so it's worth mentioning.

All in all I think they'll sell well and they'll cause their competitors to re-consider their pricing strategies if they want to stay relevant in the marketplace. In the video below you'll see them in action, close ups of all the features, and a discussion of the pros in cons.

 
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Nice review. If they're good-quality MIM, I'd buy 'em. I like how they look. No-tool adjustments, lots of people will like that.
 
Couple of questions:

What is the height of the front sight in the raised position? I ask this because some railed gas blocks sit lower than the receiver rail, which can cause some sight plane issues.

What are the adjustment increments of the sights?
 
On your first question, I know that for front sights, special versions are needed for gas blocks that sit lower.
 
Thanks for the review. I, also, have been completely satisfied with the MBUS sights, but it's nice to see some potential competition for Troy. These are kinda funky looking to me, but they are probably what I'd buy if I wanted metal.
 
On your first question, I know that for front sights, special versions are needed for gas blocks that sit lower.
The sight plane issue normally crops up with AR10s and other .308 ARs because there's ~1/4" difference between the height of the gas block and the height of the receiver rail. But I have seen it from time to time on AR15s.
 
The sight plane issue normally crops up with AR10s and other .308 ARs because there's ~1/4" difference between the height of the gas block and the height of the receiver rail. But I have seen it from time to time on AR15s.

Correct. These are standard heights so if your gas block is lower than standard upper height then they'll be low. If you block is standard height then they'll be good.
 
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