>>For safety training, function testing or safely de-cocking without damaging the firing pin, A-Zoom training rounds are much more than conventional snap-caps. They are precision CNC machined from solid aluminium to precise cartridge dimensions and then hard anodized for ultra-smooth functioning and long life. >>In addition, each round has A-Zoom’s remarkably durable “Dead Cap” has been proven to withstand over three thousand dry fires while protecting the firing pin and lasts over 30 times longer than conventional plastic examples. >>A-Zoom Rifle precision rifle snap caps are a perfect tool for adjusting and tuning your trigger pull. In addition, they help with offhand dry firing and smooth bolt cycling practice.