People are getting angry at Armalite for refusing to stop selling law enforcement firearms that civilians can’t own. I have a post-ban Armalite M15A4 AR, which I bought back in 2001, and I’ll give you another reason. I’ve always been convinced something has always been slightly out off spec with it. My Bushmaster XM15-E2S (back from Bushy’s Maine days) runs flawlessly with a wide variety of ammo. The Armalite is very picky about ammo. The factory 10 round magazine works flawlessly, but it’s jam-o-matic time with a lot of other magazines that function just fine in my Bushmaster carbine. Now, when 2004 rolled around, I converted the rifle to a “no-ban” configuration by grinding away the muzzle compensator and replace it with a birdcage flash suppressor, and adding a bayonet lug, but the trouble preceded me touching it. My theory has been that perhaps the magazine catch is slightly not where it should be, which causes a lot of the jamming issues when combined with certain kinds of ammo.
One thing I have not tried in the M15A4 are Magpul PMags, but I’ll get to that experiment once I can get over the fact that dumping a few mags of .223 these days is dinner and drinks at the local steakhouse. Even though I didn’t pay that much for that ammo, it’s still in the back of my mind.