They are done finally!!.......They are worth the wait!.....They look and work just like the 22 Cal. just smaller. I wanted to keep the same design because it worked so well on the 22 Bolts.......These actually flow better than the .22 Bolt because the stock .177 Bolt is so restrictive. I extended the probe .050 longer than the stock bolt. Try one I think you will be pleased with your results! $20.00 Dollars Includes Shipping......... O-Ring Included. Bolt is Brass....and Handle is Stainless Steel now!