Glock G20 Gen5 10mm 15rd Magazine

Glock's Gen5 15 round 10mm magazine for the Glock 20, which also fits the long slide Glock 40. It has an orange follower, a hardened steel insert inside a polymer body, and viewing windows on the back.

A G20 tends to get shot hard at the range and carried in the woods, so a spare or two is worth having. Expect a stiff spring for the first few loadings.