Can be used in any ar15 chambered in. Dropping the hammer on these instead of an actual bullet has saved me over $1,000 so far. I really like how these are all red compared to the metal-cased snap caps that more resemble real ammo.

These work well for dry fire and reloading drill practice. Protects weapon firing pin against dry fire issues. Great for teaching safety for going to the range or practicing techniques.

These are solidly built and have no similar issues. Same mfg as the traditions product. Works like a champ!

Not recommended for dry firing/cycling practices in ar 15s. They feed well but are not very durable. Look good but cannot take the pressure of the firing pin.

The tip got stuck half-way up the barrel. I think this may be due to the fact that the tips are hollow brittle plastic and they hit the side of the chamber upon ejecting unlike brass casings.