I had posted these photos previously. Here are photos of Dougs M1921 actuator with an original Colt M1921 actuator. The quality, fit, and finish of Dougs actuators is beyond reproach. If you do not want to spend $450 (if that is the current price) I understand - but they are worth every penny if you want and appreciate quality. A M1921 actuator made by machining down a M1928A1 actuator, would, I assume, be based on the price/cost of the M1928A1 actuator you start with. Knurled M1928A1 actuators sell for $200-$250 if you can find them. I honestly can't see anyone doing the conversion for less than $100.(If I am wrong, let me know.) So your rough-around-the-edges M1928A1/M1921 actuator is going to cost you $300 to $350. If you are driven only by wanting to pay as little as possible - it get it, but the Richardson actuators are not all that much more... Bob http://i51.photobucket.com/albums/f392/reconbob/IMG_1024.jpg http://i51.photobucket.com/albums/f392/reconbob/IMG_1022.jpg http://i51.photobucket.com/albums/f392/reconbob/IMG_1023.jpg