The geisslele reaction block is a must-have tool! - Geissele AR15/M4 Reaction Block

I was completing two new rifle builds and wanted to upgrade my tools. OP had the Reaction Block on sale and after looking at some reviews on YouTube, I decided to give it a try and I'm glad I did! It was perfect for the trigger install and trigger guard install (using the Wheeler Guard Install Kit), as well as my Troy ambi magazine and bolt release lever. I could position the buffer tube and lower at 90 degrees, which made working on different parts of the lower much easier. The screws on top are polymer, but they held up well and didn't scratch the tube. I still used my vise block for some of the work on my lower, but the Reaction Block got a lot of use as well!

FIVE STARS!