Lock the slide back and insert an empty magazine to see how much contact your getting with the mag release. You can see even better it you pull the spring and follower out of the mag.
Might be a little bur or something keep the release from getting full engagement.
Is the release flush on the right side when the mag is locked in place or sticking out a bit?
In Memory of Paul "Dietrich" Stines.
Dad: Say something nice to your cousin Shirley
Dietrich: For a fat girl you sure don't sweat much.
Cue sound of Head slap.
RIP Muggsy & TMan
"If you are a warrior legally authorized to carry a weapon and you step outside without that weapon, then you become a sheep, pretending that JOCKO will not come today."