This complete upper assembly features a 24" Fluted Extra Heavy Barrel in 5.56mm/.223 Rem. caliber with 11 degree competition crown; heavyweight 1" diameter under the handguard; custom match hybrid chamber with a tighter SAAMI Spec headspace from the shoulder of the chamber to the bolt face, and longer chamber throat or "Leade". This accommodates 5.56mm ammunition without developing higher pressures encountered when firing 5.56mm ammo in a .223 chamber with shorter "Leade" (both calibers can be used safely). Rifling is 1 in 9" twist for optimum performance with most lighter bullet weight varmint cartridges, and the barrel is fluted to increase cooling and reduce weight. The Varminter Upper's shell ejection path has been modified to drop all your brass in the same place as a convenience for the reloader. A vented forend with bipod/sling stud installed, free-floats the barrel from the barrel nut forward and B.M.A.S. Mini-Risers add 1/2" to scope height for correct sight picture and comfortable cheek weld. This Upper is sold complete with Bolt, Bolt Carrier and Charging Handle to ensure positive lockup between bolt and barrel extension.
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Gauge/Caliber : 223 Remington
Length : 24" Fluted
Model : AR-15
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Submitted By: Todd On 11/08/2015
Exactly what I was looking for to add to a Bushmaster lower. I wanted a full-length rifle to add to my collection of defense-type carbines to use for hunting or varmints, and this upper, with the 1x9 twist and fluted barrel, perfectly fit the bill. The rifle is accurate and functions without error. You can't go wrong with this upper or buying from Hinterland. Quality all the way around.
[5 of 5 Stars]
Submitted By: Joe G. On 06/28/2014
I have this complete rifle in the SS version. I have no problems with it's performance. It is very accurate and have no FTF's in over 2000 rounds thru it. I use it for completion shooting and this type of upper assembly is good out to 400 yards. Like the black color and fluted barrel. This black assembly cuts down on glare and the fluting helps the barrel to cool faster. I would recommend this Varminter upper receiver to anyone looking for long range to short range shots. Oh yes, with the black barrel it is not noticeable in woods.
[5 of 5 Stars]