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Magpul MBUS


r1crusher
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Okay...having acquired a new M&P15 OR I need to get some backup sights. I have been considering getting some MBUS. Now, my problem is that I don't have a fixed front sight, I have a picitiny on the gas block which I'd like to put the sight on. I have heard and read that due to it being poly that it will melt with an kind of high continuous round count.

I don't ever plan on putting four 30 round mags through it all at one time. I would like to get some tactical training with it at some point but even then I wouldn't expect that would cause it to melt.

I do plan on changing out the hand guard to probably a MOE at some point so if that lends itself to a solution, do tell.

SO....I'm hoping that those that have experience or friend/coworkers with experience w/ MBUS sights on gas blocks possibly would give me some feedback.

Flat fish, Walther, Parks, Midget, etc., all opinions welcomed.

Thanks!

Edited by r1crusher
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Magpul recommends against it and says so on their site, citing "heat issues" and that is why only a hand guard height it available (shorter). I don't know how it would work in practice but I am sure enough people have bought them and tried it out anyway so I will defer to actual experience

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The gas block pictanny uses a slightly taller front sight. A different type. Since it's lower than the sights on the flat top or handguard. Most are probably metal, although polycarbonate takes a bunch of heat. I don't remember magpul making these, so yeah, most are probably metal. I'm looking for a webpage that I saw that showed a bunch of them. This will take a while.

ARR-153_a.jpg

http://cdn1.cheaperthandirt.com/ctd_images/bgprod/ARR-153_a.jpg

Edited by ReconRat
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Here, Midway:

http://www.midwayusa.com/find?sortby=1&itemsperpage=96&newcategorydimensionid=15523

Same deal at Primary Arms:

https://www.primaryarms.com/Midwest_Industries_Front_FlipUp_Sight_Gas_Bl_p/mctar-ffgfde.htm

Cheaperthandirt:

http://www.cheaperthandirt.com/prod/Gas_Block_Height_Front_Sight

The front sights either say "handguard height" or "gas block height"

(there's a "tall" gas block rail also, see the pic in the post above)

edit: Somewhere I saw a discount for that type front sight if buying the matching rear sight at the same time...

Edited by ReconRat
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Well, John stopped over last night with some leftover goodies he had mounted up on a couple of his ARs. One was an extended carbine quad rail w/ a MBUS front sight. This setup pretty much removed all fears that I had but I still want a MOE hand guard because it feels so much better to me. I would love to see an MOE hand guard redesign with a flat top that you can then mount a section of picitiny to and it be on plane with the upper. Seems like something simple and adds more versatility to it.

So I'll run the quad and see how I like it for now. Need to get some quad covers for it though.

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Well, John stopped over last night with some leftover goodies he had mounted up on a couple of his ARs. One was an extended carbine quad rail w/ a MBUS front sight. This setup pretty much removed all fears that I had but I still want a MOE hand guard because it feels so much better to me. I would love to see an MOE hand guard redesign with a flat top that you can then mount a section of picitiny to and it be on plane with the upper. Seems like something simple and adds more versatility to it.

So I'll run the quad and see how I like it for now. Need to get some quad covers for it though.

Check out the ladder style covers.

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