Here is a great gun magazine for smith & wesson m&p shield guns. This is an 8 round 40sw gun magazine made in the usa by promag Industries. This magazine is made of blued steel and has technapolymer base and follower and anti-fatigue spring. Guaranteed for life. Gunclip Depot has the largest selection of Smith & Wesson gun magazines and gun clips. If you do not see the gun magazine you are looking for send us an email and we will try to locate it for you. Orders shipped within 24 hours except week-ends and holidays.