Does the T3X have CRF?
Have to say, just click the magazine in. I get you could loose it but (touch wood) never had an issue!
The T3X does not have CRF and as for the magazine issue my only experience was an anecdote from a pro stalker who lost a magazine leaning across a water trough and the magazine release catch was caught leaving the magazine to go for a swim. The 85 magazine needs a little pressure for the release catch to work.
