David from United States, NC Public Profile

Using this on the forward-most mlok slot will move the sling swivel forward ~7/8" compared to using a traditional sling adapter (with the socket centered on the slot). 7/8" doesn't sound like much, but it's a huge difference if you have a short rail or a WML mounted at 12:00 on the very end of the rail.
The lower edge of the adapter was not comfortable when using a c-clamp grip for an extended period of time, so I rounded the edge with a grinding wheel and put a ranger band around it for padding. I wish the edge wasn't quite as square from the factory, but this is still a great adapter. Much better for short rails than the traditional QD sling adapters

These are my favorite lights for ARs with red dots. The press for constant-on and hold for momentary-on is great. I mount them at 12:00. For night shooting, I rest my thumb over the light and use the button on the light to activate it (I don’t use a remote switch). It’s especially convenient because it’s easy/comfortable/thoughtless to activate the light regardless of which hand is my support hand (great for shoulder transitions).
I wrap electrical tape around the rear a couple times to ensure the rubber insert for the remote switch port doesn’t fall out. Then I put 1-2 ranger bands around the electrical tape to add some padding between the light and my thumb knuckle (I c-clamp directly behind the light when it’s daytime and treat it like a hand-stop; I like the underside of the rail to be smooth).
On a 9” rail, the light is visible in the bottom ~15% of the optic on 1.93” height optics, but it’s not noticeable when using the weapon. The light takes up more of the sight picture with longer rails, but I still don’t notice it with a 13” rail. If you’re using a magnified optic, I recommend an offset light.

I like this upper for slow, low-volume shooting. It's very light and maneuverable. I think this is great for beginners, kids, and women who might struggle with the weight of a beefier upper.
The handguard is very slim and gets hot quickly, especially if you plan to use a suppressor. I also think Aero is getting kind of expensive for the quality. Considering BCM uppers come with a BCG, I think they are a better value for someone who will be shooting a lot.

The old 3.850-length magazines had a unique follower (and were great), but the new magazines use the same follower as the 3.715-length magazines. The shorter length and 'universal' shape allow the follower to tilt/move excessively. In my 300 PRC Bergara, the movement causes failures-to-feed unless there are at least 3 rounds in the magazine. The failure occurs every time; it is impossible to feed the last two rounds from the magazine into the rifle by running the bolt.
I spoke with Accurate-Mag on the phone ~6 weeks ago; they stated the 'universal' followers were a cost-cutting implementation and not a mistake (initially I thought the 3.715 follower in my 3.850 mag was a mistake at the factory). Accurate-mag asked for an email with photos and a detailed description of the issue. I sent an email that day but never heard back.
I hope they revert back to the old followers, even if the price goes up a few dollars.

Don't buy 3.850 length Accurate-Mags until the design is fixed!

The Fab Defense Gradus Rubberized grip is the best grip I've tried. The angle is perfect and the curved backstrap is more comfortable than grips with a flat backstrap. This is a polymer version of the Gradus Rubberized grip, and it is just as great. Polymer vs Rubberized is personal preference, but the size and shape of these Fab defense grips are perfect for me.

Out of all my BCGs (Aero Precision, Wilson Combat, Griffin Armament, and a couple cheap mil-spec ones), these Walker Defense Research ones are my favorite. Nickel-Boron is the only way to go for high-quality builds. These are some of the least expensive Nickel-Boron BCGs on the market and the quality seems to exceed all the other NiB BCGs I own. Great for precision builds but also performed flawlessly and stayed surprising clean during extended durations of suppressed high-rate fire. These Walker Defense Research BCGs consistently have less carbon build-up than my other NiB BCGs with all other factors being equal.