Fantastic product. Bought a 3pack for my CZ and they fit perfectly. Great weight and no binding on the release. They are pretty sturdy so watch your toes if you're practicing barefoot!

Good fit and finish. slightly under weight compared to an actual mag loaded with 10 rounds of 9mm 115 grain. These imitation mags fit my Springfield RO 9mm and work well combined with a real mag filled with dummy rounds for dry fire draws and reloads.

Durable, function as advertised. The SIG P320 21 rd practice mags are 60% of the actual full mag weight. Sufficient for my use. Follower allows user to cycle the action w/o slide lock. In short, dryfire practice is more realistic and efficient with this product. Add a laser 'bullet' simulator & you are good to go.

I was surprised by how sturdy these feel for being plastic. They have a good weight to them and can handle being dropped on the floor without getting damaged. They fit my Shadow 2 perfectly and fall out easily when the mag release is pressed.

I was looking everywere for these as I've been using wrist weights to try to simulate a fully loaded magazine and was considering trying to build something similar myself, but I'm not that handy and I know I'd make a mess of the project.

I received them yesterday and am really pleased. They are slightly longer than a regular G17 mag, but they work very will and the tolerances seem to be spot on to a Glock mag from a fit perspective.

I would highly recommend these if you are using a MantisX dry fire training system or their Laser Acadamy product as it simulates the feel of a fully loaded Glock, prevents the slide from locking back during dry fire practice, and also supports a laser cartridge for their Laser Acadamy product. I went all-in with MantisX and don't have experience with other dry fire training products. The the DAA dry fire practice magazines along with the Mantis are a match made in heaven. Mantis has several variants of reload drills and these magazines were the missing piece of the puzzle. I'm surprised Mantis doesn't offer these on their website, but I'm really glad I found them here, and again they work great.

The only thing I'd like to see is an option to purchase a magazine with tungston or some very heavy metal to help improve endurance during dry fire training. Maybe this is a bad idea but it would be interesting to try out. Great job Double Alpha team!

Great product & very helpful with dry fire training. Magazines work well with both USPSA & IPSC compliant mag well.