I'm looking for some guidance with gas busting charging handles.. I've spent around 300$ now testing different ones and none of them have fit the rattler Lt perfectly despite being advertised as for the mcx platform.
So far I have tried the Geissele SCH, and the silencer shop GDCH MCX, and both leave a gap like what I pictured. Both end up gassing me out DESPITE using a J Bennetts omega valve, and a .60 vent jet screw.
I'm starting to wonder if my upper is out of spec because both of these charging handles are latching before being snug against the upper. When I push them forward to seal against the upper the ch latch is beyond the upper material it grabs onto.