I ordered the Jonathan Arthur Ciener Inc. 22 conversion. The 10 round magazine it comes with is pretty shotty. Out of the first 10 rounds, I had 4 FTF and 2 double feeds. I ordered the Kel-Tech 26 rd magazine with it. With the Kel-Tech, all 26 rounds fired flawlessly. The conversion is amazing. I can use .22 to sight in my optics and target practice. No more using good quality 5.56 for paper. Especially with the lack of ammo and raising prices.