Ben Brooks, on brooksreview.net:
I sent my 11 year old GR1 for repairs last week and GORUCK offered to replace it:
What’s important here is that those GR1s (despite what GORUCK might say in marketing) are a different size than all currently available GR1s. But not by a lot. They are slightly smaller than the current 26L GR1s, and most consider them to be 25L in capacity. I’d say they are somewhere between 24-25L.
We have received your gear from your Scars Repair request and have inspected it fully. Besides the reason it came in, there are other issues of normal wear and/or age. We would like to send you a new ruck!
However, I was a bit confused when they asked me to pick a size, since I didn’t remember they had two. Ben Brooks article helped me understand the difference. I’m leaning towards the 21L though.
Update 2023-07-25: Well, that was easy. I didn’t read the fine print, where for $25 in shipping, I could get back my original GR1. A fews later, I have both my old faithful and new 21L GR1.