Most of the small variables weigh at least a pound.
One of them that weighs closer to a half pound, is the Leupold Mark AR 1.5-4x. It weighs 9.6 ounces, and can be had with the daylight bright green FireDot reticle.
For a red dot I like the Burris FastFire III. I have several, and without mount they weigh less than one ounce.
But although the FF III dot's are fast, they lack at longer range. A little magnification can be nice, as long as it doesn't hinder your up close capabilities.
The Leupold Mark AR, when set to 1.5x and the dot is on, is quick, almost as quick as a dot like the RMR or FF III. But you can turn it up to 4x if needed, and having some BDC or ranging features built into the reticle is nice, something that simple red dot won't give you.
If the Primary Arms 1-6x has the quality and attention to detail that the PA 3x prism scope I just got has, it should be excellent.
I have mine on a Palmetto KS-47, and the PA scope I got has the ACSS reticle made for the 7.62 x 39.
Available Killflash, tethered caps, the excellent ACSS reticle, very sharp optic.
I've owned a couple ACOG's, and the PA Prism is close, for a fraction of the ACOG's price.
I know it's not a variable, and it weighs a pound, but I am liking the 3x Prism more and more.
I put an extra FF III I had up on the piece of rail the 3x has, just to see if I liked it, but I'm not sure it's needed. Up close, that big horseshoe is easy to pick up.