New 20" AR15's?

T

Tonyk

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I'm looking for a 20 inch AR15 with a government profile barrel. So far I've just been poking around the CGN sponsor's sites and so far I've found ArmsEast selling 20 inch Stag rifles, Wolverine with 20inch armalites and P&D enterprises with bushmaster xm15 20inch rifles.

Who else sells the 20 inchers here in Canada? They seem to have fallen out of favour so I figure that really might be all there is out there for me to choose from.

Has anybody out there owned a stag/armalite/bushmaster who can vouch for those builds?

Thanks
 
Not new but Norc CQ311, if you can find one. Show up occasionally on the EE, but not often. I like mine. Am not interested in anything less than 20". Maybe there are some NIB examples out there?

M
 
Noob question here, but does accuracy improve with a longer length barrel?
What lengths would be accurate for the range of 200 - 300 yards?
 
KMAX said:
Noob question here, but does accuracy improve with a longer length barrel?
What lengths would be accurate for the range of 200 - 300 yards?
Click to expand...

For shooting paper at that range almost anything would be fine. The longer barel doesn't improve accuracy, with iron sights, the longer sight radius makes it easier to shoot accurately. In combat situations the velocity loss from short barrels decreases the lethality of the round, but for paper, who cares
 
Longer barrels equal higher muzzle velocity which means less wind drift. In theory a longer barrel will be more accurate at 2-300 yards based on this. On a dead calm day......that advantage is lost I guess.

Also depends on how accurate you want/need to be. I've shot my 14.5 to 400yds with more accuracy than I thought. Others have short shorter barrels longer distances with good results.

I don't think there is any one correct answer for barrel length of ARs. They are used for so many different kinds of shooting sports that it is hard to find a perfect one size fits all.
 
Also don't forget optics plays a big picture too... the better the optic, the more accurate hits you'll get. Not saying get the most expensive one you can find, but find a good one that's suitable for your situation, lifestyle, etc...
 
Yeh, that is like 0.2" more at 200, 0.5" more at 300m and 0.9" at 400m in a 5MPH cross wind - these are the differences in wind drift between a 14.5 and a 20.

Can anyone here detect a quarter MOA wind shift inside 500m?

Straight out of the KAC ballistic calculator.

Bolivar said:
Longer barrels equal higher muzzle velocity which means less wind drift. In theory a longer barrel will be more accurate at 2-300 yards based on this. On a dead calm day......that advantage is lost I guess.

Also depends on how accurate you want/need to be. I've shot my 14.5 to 400yds with more accuracy than I thought. Others have short shorter barrels longer distances with good results.
Click to expand...
 
Are the numbers from the KAC program inches or minutes?
Looking at the Sierra ballistics program, in a 4mph wind, with 69gr SMKs, the 20" rifle would have a .2moa advantage at 200m, .5moa at 500m.
About 1/2" and 2 3/4". Might cost a point or two when close shots are considered.
But a 4mph wind is pretty light; let's look at 12mph. The difference is now .6 and 1.5 moa. 1 5/15" and 8 1/4".
8" at 500m is the difference between an on the line 5 and a miss, on a Fig. 12 target.
That is noticeable. Provides a much greater margin for shooter error in changing conditions.
Very few shooters can detect and adjust for 1/4 minute changes. But in typical conditions at Connaught, let's say, having a minute or more less drift is an advantage. Particularly during rapid fire or snapshooting situations or position shooting, when the shooter needs all the help he can get.
 
lawn gnome said:
It is perfectly ok to like the full length rifle.
I prefer them too.
Click to expand...

It seemed everyone wanted the m-4 type rifle lengths (and shorter) because a) They're "###y" and b) That's what was being used in Iraq/Afghanistan by the "special operators"

The 20" models sat on the shelves despite the better wound ballistics and sight radius (if using irons, which no one hardly does anymore it seems).

I'd go with the H Bar profile because it takes longer to heat up, and there's less barrel flexing when using a sling.
 
I was interested in a Rifle too.....
But I just built my own. pick up a Noveske 18" SPR barrel and build something nice.

nov3.jpg
 
Epps is certainly free to set their price.

That out of the way. For anyone looking for a new Service Rifle, you owe it to yourself to check out those MOD4DMR rifles at Epps. We had 25 of them commissioned with competitive CDN Service Rifle and LE use in mind. Match Grade 1/7, 223 Wylde, Non-Chrome Lined, ~.80", 4150 CMV. Nice barrel. Tight rifles.

They are beautiful. They went quick. Wish we had more.

The NEW HBAR from CT.

AFAIK, the only rifles left in the country are in Orillia.
 
Its generally accepted that shorter barrels are more stiff and tend to be more accurate (in the same profile) due to less flex. With a longer barrel there is a bigger chance of imperfections. The trade off is less velocity and everything that goes with that.
 
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