I’ve got one of these that replicates a Springfield XD-9 Service model. The detail is amazing. It’s a direct mold and that’s what makes it so nice. It has the same feel as your carry gun, fits in the same holsters, everything except weight, trigger pull (of course), and perhaps any custom mods you have have done (e.g. sights). In my case, I did have to take the Dremel to it because the grip safety button was molded too… but whereas on the real gun the safety depresses and you never feel it, it’s solid on the bluegun and thus doesn’t depress and is irritating in the hand; a little Dremel work and it was gone and feeling like the real XD would in the hand.
The great thing about such training aids is you can use them for all manner of training that doesn’t require live fire, nor would you want live fire. With this big block of blue plastic in your hand, there’s no mistaking it for a gun (no rules violations). It’s good for working with a partner… you have the bluegun in your concealed holster, you work with a partner in a live scenario, and you can roll right into defensive actions including drawing and pointing the bluegun at them. Safety.
I often use my bluegun at home when I’m practicing mixed combatives and don’t want to risk damage to any real guns while I’m practicing something. I also think it’s a little less bothersome for any neighbor that might see me practicing.
Rings offer a lot of things, not just guns (e.g. replica pepper spray cans, radios, etc.). It’s all meant to help you perform training exercises where you need the realism but not the dangers.