Kirk

Thank you. Tried 4 different mags, but all same manufacturers

AR 10 in 308 having feeding issues with mag installed. Bolt slows about half speed with ammo in mag, no ammo it closes normal speed. Closes normal without mag. Cycles fine when single loading, locks bolt open like it should. This is driving me crazy trying to figure this out. I've never built an AR10 but have built 9 AR15's with no problems. Thanks in advance