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Ivanhoe
07-06-2009, 1:00 PM
Just like the title - what is the defintion of a low profile upper? I searched of course but really didn't find the answer. I have read about low profile gas blocks but wanted to hear from those more AR literate to help me out. I have my lower completed but still on the fence on my upper purchase.

Rod

hybridatsun350
07-06-2009, 1:26 PM
Are we talking about the DPMS Lo-Pro upper receiver or a complete upper?

http://www.dpmsinc.com/store/products/?prod=821&cat=1704

http://www.riflegear.com/p-464-noveske-n4-145-light-carbine-low-profile-upper.aspx

OutlawDon
07-06-2009, 1:30 PM
Just a term to define an upper without any risers or carry handle.

Ivanhoe
07-06-2009, 2:14 PM
Thanks Outlaw- I assume a traditional A2 front sight has nothing to do with labeling an upper low profile or not?

Datsun- I was talking complete upper.

fairfaxjim
07-06-2009, 2:21 PM
The low profile or "Lo-Pro" upper does not have any extra protrusions. There is no forward assist, shell deflector or dust cover on the receiver. The gas block has no protusions either, no sight or accessory rails. It is a flattop receiver.
http://www.gunaccessories.com/AR15-M16Parts/FTT-LP.jpg


DPMS sells uppers with 24" bull barrels and the Lo-Pro upper here:
http://www.dpmsinc.com/store/products/?prod=799&cat=1851

OutlawDon
07-06-2009, 2:22 PM
Thanks Outlaw- I assume a traditional A2 front sight has nothing to do with labeling an upper low profile or not?



Having the A2 front sight doesn't make it low profile anymore so it's got have flip up front sights and flip BUIS, or something "low profile" or nothing at all.

Ivanhoe
07-06-2009, 2:33 PM
Thanks again for the help folks!

I was getting confused when I was on Larue's site and saw this description:

http://stores.homestead.com/Laruetactical/Categories.bok?category=Stealth+Products

LT DMR-16 upper "Incredible accuracy in a low profile package" yet shows the traditional front fixed sight.

Omega13device
07-06-2009, 2:45 PM
In the Larue description they're using it in the sense of "not attention-getting" compared to the Stealth uppers. The DMR barrel is black so it blends in with the crowd better than the Stealth upper which has a barrel with a stainless finish.

In the context of uppers in general, low-profile usually means a railed handguard with a low-profile gas block (LOW = it fits under the handguard) and a flip-up front sight.

Ivanhoe
07-06-2009, 2:53 PM
Thanks Omega! It's beginning to sink in now-

swerv512
07-06-2009, 6:53 PM
i was under the impression that "low profile" refers to a flat-top style receiver that has it's picatinny rails directly atop the handle... kinda like the pic above.
this is in contrast to a flat-top receiver like the dpms lr-308 that has a significant riser between the level of the charging handle and the picatinny rail like this:
http://img.photobucket.com/albums/v310/swerv512/DPMS-LR308_3.jpg