Originally Posted by
7n6
You can replace the gas port grommets, FN just uses one of the larger diameter ones so it's more reliable with a wider range of ammunition. It's not a bad system but I'd prefer one that is externally adjustable. As far as canted screws on the rear trunnion bracket, there's no way around it- they basically fudged the design. They should have had inserts that go through the trunnion bracket and then through the receiver itself while running the machine screws through into the insert. That way the insert binds the bracket to the receiver and the torx screw only serve to keep the insert from backing out.
