Greetings. Recently purchased 4 x 20rd factory mags with 2 spot welds on back of mag. On all sides of welds mag had pronounced arches in sheet metal that are sharp and will allow debris to enter mag hsg. They were returned to C.T.D.. bought 6 more from brownell. 3 spot welds on spine. Same pronounced sharp arches. Returned to Ruger. Talked to Ruger after receiving each shipment. Sent 6 mags from brownells to ruger per customer service directions, also pics of the 4 from cheaper than dirt. Ruger informed me that they will be sending same mags back and this is the way current vendor supplies them! Im out 40.00 + in shipping and 6 weeks of fooling with this issue. Have others had same problem? Match sticks can be inserted in mag thru these gaps.