Metalform Colt GOVT 9mm BL 9-Round FLT/WLD FP. Made of a thicker cold rolled steel and is very durable. Limited lifetime warranty against cracking breaking separation due to heat extreme cold or any other abrasion. Many factors go into producing a magazine with strength and durability issues. These are usually resolved by the magazine being dropped or a magazine being dropped and ejected. Metal magazine springs are preferred over plastic or glass as the springs are more durable and last longer. Note: the picture shown might differ from the actual product by color or finish. Package Contents: Metalform Pistol Magazine What firearm models does the manufacturer say Metalform Pistol Magazine is compatible with? The manufacturer suggests that Metalform Pistol Magazine is compatible with SIG Sauer P238 Colt 1911 GovernmentMetalform 9293: Colt GOVT 9mm BL 9-Round FLT/WLD FP