HKS Magazine Speedloaders for centerfire calibers feature a rugged, comfortable, thumb activated cam-lever system that lets you load a 15-round magazine in 18 seconds or less. Rimfire Speedloaders depress and lock the magazine follower in the down position for easy loading.
Works right or left handed for fast filling of staggered magazines
This magazine speedloader is for staggered magazines only From the manufacturer:
*Note: The HKS GL940 is not designed for the S&W Sigma, but some customers have reported being able to get it to work well enough for them.
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