Taken with my new 10mm Witness I have the urge to add some hop up parts and tweak it a little. So far I`ve polished the feed ramp and added a Wolff 20# recoil spring. Next I`m looking into MecGar adj. sights then possibly checkered walnut grips from EAA, an EAA hardened slid stop/slide release, EAA stainless trigger (which I`d polish the face on) with overtravel stop, extended safety etc. etc. Has anyone had experience with any of these parts? Tell me about your hopped up/custom Witness! Marcus