I have thousands of rounds through five different guns in .380 and 9mm. Never a hiccup. I wish other aftermarket parts were a reliable as Magguts.Have seen them, but $35ish is steep, and they add length like the pinkie extensions do. The Gee plate or the GAP I have used for glocks is still a flat base pad, but sticks out in the front to lock your 2 fingers into the grip, works better than pinkie extensions, and no added length for IWB or pocket carry. Can basically get 12rd mags and sleeves for my standard p365 and end up about the same length and grip size. IMO they are better on the XL, basically adds a base pad, no real increase in length, and 14rd vs 12 without going to the pretty long macro grip/mags. Have one of their kits for my Kahr PM9 and works well, but still kinda nervous about aftermarket parts in a defensive mag, more because of reliability than anything.