Go to pg 3, and look for a thread titled Wow...nitride, then look at the pics you'll see the upgraded backplate, and know what to look for when shopping, at this point, since this is a recent change, I would'nt buy one via the internet sight unseen, as there's probably alot of new, older guns sitting in wholesaler's warehouses, so you could'nt be sure exactly what you'd get. The striker assembly has been up graded for awhile, and from what I've read striker rotation seems to have been resolved. Fixing the backplate was a huge improvement..