The Aero Precision M4 M4 carbine felt light to me on first contact, compared to other rifles using the same platform. Even though it is lightweight, it is very sturdy. The materials from which the gun is made seem of good quality. The Magpul's stock is very sturdy, well built, tight tolerances, and even though it is adjustable, I didn't feel any noticeable vibration nor was I bothered by the recoil spring and counterweight slipping. The gun is fully ambidextrous, the controls can be accessed from either side of the rifle. The trigger and bolt latch are very quick to find, as is the mag drop button, but not so obvious that you accidentally activate them. The safety gives you positive feedback on activation and deactivation. The trigger isn't easy, but it's very accurate and predictable, without overload or that spongy feel that enhances the accuracy of the shot. In fact, I couldn't wish for a lighter trigger on a combat weapon. The 16° barrel is floating, kept the groups tight despite the rapid fire. The handguard offers enough room to add accessories and is thinner in diameter, which gave me a firmer grip. Being thinner gives a better grip, especially when using tactical gloves. The gun is clearly a quality gun, lightweight, maneuverable, very reliable (I've also used lower quality ammunition that worked flawlessly in this rifle), with very good recoil control. Plus, on request you can add an adjustable gas block and they have a 45% safety lever, for those who use that.

Personally, I think it's a weapon you can always rely on.