Peltor - 3M ProTac III Shooter Electronic Ear Muffs 32dB Accu-Shot The chamber rod may be

The chamber rod may be used with a chamber brush or bore brush with a patch

These caps are designed to be user-friendly and screw-on securely to your optics

They come to you filled and ready to use

But it is also used for some other cartridges in that same 'family' which are the same case length as the parent case

Peltor - 3M ProTac III Shooter Electronic Ear Muffs 32dB Accu-Shot The chamber rod may beThe 3M PELTOR ProTac Shooter Headset is designed for use whilst sport shooting. It helps protect against harmful impact noise, whilst allowing ambient sounds to be heard at a level below 82dB. It increases your ability to communicate with others nearby, as well as increase your ability to hear lower audio sounds. A great value in electronic level dependent hearing protection, 3M PELTOR is a leading brand in electronic level dependent hearing