For a striker I took a two inch section of hacksaw blade and smoothed the corners, put a piece of duct tape over the teeth and attached it to my ferro. This setup throws lots of sparks and the bit of hacksaw weighs next to nothing.
Yes I have a coated NMSFNO and the rounded treatment makes it pretty hard to find an area for striking a ferro rod....so I have re-attached the striker which is like the one you have made above and I tuck this into some paracord wrapped round the sheath...it stops it rattling around...but it will probably shred the cord in time and I fancy putting some of those dimple grip points in the upper thumb groove as a strike point...like those on the SAR4.
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