I like these, I’ve found they work with my shield mags and my full-size M&P mags. They’re not perfect, but they’re affordable, practical, and easy to clip on. I’ve been using these for close to a year now.
2-Pack Universal Magazine Holster IWB Clip | 9mm .40 .45 | Mag Holster For Glock 19 43 17 Sig 1911 S&W M&P | Fits Any 7 10 15 Round Clips For All Pistols | Gun Ammunition Holsters | Handgun Ammo Pouch https://www.amazon.com/dp/B07FM39LNB/ref=cm_sw_r_cp_api_glc_fabc_z799FbHRC5EH3