I like this rifle a lot... I put a Magpul STR stock on it and tried several grips, finally settling on the BCM Gunfighter mod 0 (still had the Hogue on it in the pics). I swapped the trigger for an ALG Defense ACT and eventually switched to the lighter purple spring. I'm running a nearly 20 year old Bushnell holosight that still does the trick, I'm waiting for a replacement C-clip so I can install an ambi bolt catch and release (the one from RWA), and I'm looking into an ambi mag release - Forbus, Norgon...?
I used my wk on a recent tactical carbine course I took at Urban Tactical - tons of fun, highly recommend it - and got to see how it functioned away from a rest. I had issues several times with failures to feed, but only with my 5/30 steel and aluminum mags, my Pmags ran perfectly. My LAR15 pistol mags fed fine but didn't drop free, I had to pull them out, not fun in the middle of a timed shooting drill. I had installed a reverse fake can, like the ones from TNA...it looked really cool but it turned the muzzle into a flame thrower and I could really feel the extra weight, so I put the birdcage back on.
I've submitted a form 6 to the ATF to take it over the river to shoot at the Ohio Tactical Officers' Association conference in June - I'm taking 2 rifle and pistol courses there, (with my M&P 2.0). Have any of you applied to take it Stateside? Any issues?