This is neither meant to be a knock against, nor an insinuation that it is needed more often, but why do you guys have so much experience with CS at these companies for it to matter?
I have literally bought dozens of uppers from BCM over 9 years and emailed their CS once. I now usually buy my BCMs from Grant and have yet to need to contact him. I own Centurion and Sionics products and have never needed to contact either. CS matters of course but only to an extent. I don’t need a personalized email from Monty asking me how my weekend ha been, although a birthday card signed by IG would win me over for life.
Yes. I believe it’s a Mk4 although it’s been a few years and they are up to like Mk196 now so I’m not 100% sure. I like it for that role because weight doesn’t matter and it’s shot from the bench, bipod, or barricade 99% of the time. I had the same rail installed on a DD lightweight barrel and it felt clunky and “sharp”. I know the newer versions are better but personally if it isn’t getting a laser I like to run Magpul MOEs anyway. I’ve driven over a 6920 with the tires of a 4Runner going right over those things and they didn’t even wince.
I like the BCM KMR and think the A model while heavier is a step in the right direction from the original which would certainly not have held up to being driven over by a vehicle. Centurions rails are great, and their FSP cutouts are awesome for side mounting PEQs. I’m ranting now but I really don’t like threads like these because it turns into a brand fest.
Back on topic -
All the good companies (Sionics BCM Centurion) offer unique products far outside of “you can’t go wrong with any of them”. While that is certainly true, depending on what you’re using the rifle for you can go better with one over the other.
For example, if I were setting up a rifle for dedicated suppressed use at night I would, and did, get a Sionics RGP barrel with a Centurion rail and a BCM upper and complete lower.
The differences and value each of the aforementioned companies provide are present and tangible, but they are easily missed if your shooting day consists of lugging a pristine rifle case to your local 100yd static range before you go to the Chinese buffet.
At that point your brand “preference” comes down to things like who emails you more nicely, what roll mark looks better, and what brand will get you the most likes on Instagram.