RAE speed loaders are fine-tuned across more than two-dozen critical dimension and specifications for EACH individual magazine resulting in perfect fit, speed, comfort, and durability and seamless operation for years to come . Specifically designed for EACH firearm model. Magazine is NOT included and is for demonstration purposes only. This complex , developed in the USA, creates high-quality loaders that are simply the fastest and easiest to use. May be used with thumb from top or with thumb and pointer finger along rim. Non OEM magazines are likely to work.