7.5" or 10.5" range toy?

Mark-II

Mark-II

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I'm pondering a fun-gun sized AR upper and I'm deciding between a 7.5" with a pistol length gas system and a 10.5" with carbine length

If I'm likely to be shooting cheap norc ammo for the next few years before starting to reload, which would be the most reliable setup?

I'm looking at the NEA offering in particular since I've already got one of their rifles.

Thinking iron sights, 100m and under distances, and moderately obnoxious fireballs - lol
 
Go 10.5"...the 7.5" is more finicky and can take some tinkering to get it going right (not that I've had that issue :)). If you're well versed in AR's then have some fun and go with the 7.5"...they're a darn hoot!
 
10.5" with a muzzle brake you'll have the best of both. Reliability and longer range of the 10.5" and with the muzzle you get blast,noise fun"cool" factor of the 7.5". With the cheap Norc ammo(crate of 1120rds) and my Surefire MB I can stick a sausage at the end of the barrel and have a BBQ. Lol
 
A well built 7.5" will run just as reliably as a 10.5" in my experience.(or possibly better) That is to say that both will run fine if you buy a decent setup. Choose the barrel length you prefer the looks and handling of.
 
I have a new 7.5" NEA-15 that I really hope to put some rounds thru soon...I have owned both 20" and 14.5" AR's before, but have now decided that if it is restricted I want it as small as possible...:)

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I have one of each....both are great range toys. 7.5 inch ARs are very reliable if built correctly.

Spikes 7.5
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DDMK18
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OP, let's be honest here...the real question is which are you going to build first? :)
I'm about to start a 10.5" mk18 build myself.
 
Thanks for the responses. The graph was an interesting read as well. Seems case life might be pretty limited, but then .223 is essentially free from the range anyway.

I was looking at the NEA rather than building. I've not put one together yet, and so far have only done basic upgrades and cosmetic changes to my rifles, so if shorties get finicky if not done right, then perhaps that is not the best way to get into building.
 
.223 in a 7in barrel is slower then a 25in barrel, but it is still faster then a 9mm…. The best of both worlds is a PDW 7in and a 18in...
 
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