This is a discussion on Your Favorite AR within the Rifles forums, part of the Armory category; I want my favorite AR15 to bre the last carbine I built. 16" RRA chrome lined lightweight barrel, YHM free float tube, BCM coated (forget ...
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|February 23rd, 2013, 06:10 AM||#31|
Join Date: Oct 2012
I want my favorite AR15 to bre the last carbine I built. 16" RRA chrome lined lightweight barrel, YHM free float tube, BCM coated (forget the coating but its sort of shiny and black) bolt/bolt carrier and a SUIT.
Originally it had the matching RRA chrome bolt/bolt carrier but I had issues with my standard reloads (55 grain fjm bt with IMR4198 powder). High pressure issues, really flat primers, occasional primer getting blowin out into the receiver and causing stuck bolts, jamned up trigger/hammer, etc. I got out some other AR15's and started swapping bolts/carriers around while checking headspace and found one (the BCM bolt was in my .300 black out carbine) that loosened things up a bit by the ga. I took it shooting the other day and it showed no pressure issues with my reloads (they work fine in all my other AR15's - that's why they are my standard reload) so it might end up being my favorite, that was the intent, build one with all the things I wanted on it.
I have a couple of 20" HBAR flat top clones but I don't shoot them much. Its hard to decide which one of those I like the best. They are pretty similar except one has a free float tube and the other does not.
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|May 16th, 2014, 01:22 PM||#34|
Join Date: Jan 2008
DI is fine, and is a world class platform if you keep it lubed and you buy a quality military grade AR (Colt, DD, BCM, LMT, Noveske and KAC). All the rest are commercial grade guns built for the masses, i.e., low volume shooters, or will ride around in the trunk of a cops vehicle, not being used/shot much, so they're not built to higher quality. The industry knows that the typical person will not shoot over 200-500 rounds a year, so they build them accordingly. The M&P15 is the best out of the commercial grade guns. DI guns have commonality of parts with other DI AR users, which is the overwhelming majority of the ARs being sold and owned. If your Piston goes down, unless you have someone who has piston parts of the same manufacturer, you'll be out of luck.
Piston are an answer in search of a problem, most piston designs are proprietary so they are not interchangeable in parts, not common in usage, deposits the carbon on the other end of the gun. I have 2 x 6920s, 2 Daniel Defense (one is a MK-18), and 1 x Noveske. One of my Colt 6920s has over 22K rounds fired, and seen many 1500 round 3 day carbine courses, without a hiccup. I have seen entire SWAT teams break their Bushmasters and DPMS guns before the end of TD 1 in carbine courses. Not blaming the cops, but bureaucrats with a budget decides what gun LEOs use. What normally breaks during a carbine course? Commercial grade guns.
Last edited by RogerTPA; May 16th, 2014 at 01:27 PM.
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