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I've got both Ranger plates and L plates, it's how I distinguish between 5 round and 10 round mags. Mine are 7.62x39, so all my mags are pistol length.
Both plates work great and can take a beating but the Ranger plates add some needed length to LAR mags.
I had to trim the legs on all the followers. I used side-cutters, took 20 seconds per mag. I removed enough to insert on a closed bolt. Comes out to about .250, but measure for yourself.