I ended up removing mine, wasn't reliable enough. Saw two of them this weekend at Central European Shotgun Championship crap the bed, the Russian team I was shooting with all removed their lifters after trialling them.
The lifter is a little longer than a standard but not extended like a Taran/C-rums for example. Most of the time that is only done because the loading port isn't opened correctly and people catch thumbs because of technique. The lifter is plated so it has a smooth surface finish to load on
Mines in an a&s trigger, 50 birds sporting clays loading twins to test it on Saturday. won practical shotgun comp on Sunday with it fitted l. Hasn't stopped yet
Hi from UK. I have a j Kenny lifter installed in my m2. It works very well. It's two piece design and one additional spring. (similar to MOA but in different location. I also have an moa precision lifer that doesn't cycle rounds at all.