I really like my Advanced Armament M4-2000;
www.advanced-armament.com
It’s pretty small (1.5” x 7”) and relatively light (23 oz, iirc), and works very well. I especially like the fact that it uses a quick-mount with a proprietary flash-hider, rather than using the AR’s fine muzzle threads. Using its flash-hider mount, even though the unit’s 7 ½” long, it only adds 5” to the overall gun length when attached.
It’s got a lifetime warranty for even belt-fed full-auto fire, so with the strictly semi-auto fire I use mine for, it should last an awfully long time. Zero maintenance; no disassembly for cleaning, “re-packing”, etc. Just the occasional soak in a container of Simple Green once every 1000-2000 rounds or so, and that wouldn’t even be necessary so often if I didn’t shoot so many .22LR’s out of it. (22’s foul it MUCH quicker than the .223’s do; which surprised me at first. The .223 tends to ‘blow’ the crud out of the unit, where the .22lr just ‘tosses’ the crud into the unit, where it lands & builds up.)
Be aware that a suppressor does increase back-pressure, which means a faster cycle time and more crud blown toward your face around the AR’s charging handle. They make charging handles with slightly-oversize back plates for just this reason, but I haven’t put one on mine (yet). Faster cycle time also can have effects on function; just something to keep in mind.
AWC, ArmsTech, and Gemtech are all ones that I’ve never heard bad things about, although I have no personal experience with any of them.
Cost of mine was around $950 or so, when all was said & done. Sales price was $625 for the basic suppressor, $50 for the black finish (rather than silver), $200 ATF tax, shipping, sales tax, etc…
Gotta confess, they’re addictive. I put off buying one for years, and now that I have one, I shoot the foo out of it now, and have another (.22 pistol, integrally-suppressed) on order.
