If you mean coil spring mainsprings, that is nothing new. All of my hardware store guns have them. I think I'd prefer them in fact but on a sidelocked gun such as my Zephyr V. Sarasqueta 20 ga. I think I'd have hell's own time trying to replace a broken V-leaf mainspring. Aside from that, I noticed no more coil springs that were visible in the Turk's guts. Only removed the stock to get rid of that Browning-Remington-Mossberg-quicky finish which I detest. Very plain wood but hard, light, and well inletted. We'll see how it shoots, keeping in mind that I am more than a little prejudiced in favor of larger bores. Chops