SUREFIRE Sonic Defender EP4 size:M Premium type HAIII hard-anodized anti-abrasive

Premium type HAIII hard-anodized anti-abrasive finish

The MOE M-LOK  forend is longer than the factory forearm

Removable custom fit EVA insole

and spill resistance

223 caliber and larger

SUREFIRE Sonic Defender EP4 size:M Premium type HAIII hard-anodized anti-abrasiveEP4 Sonic Defenders Plus protect your hearing without interfering with your ability to hear routine sounds or conversations. Their triple flanged stem design fits larger ear canals and provides a Noise Reduction Rating (NRR) of 24dB. Sounds, at safe levels, are allowed to pass through into the ear canal, while potentially harmful noises (above 85dB) are reduced via a proprietary design that incorporates a special noise reducing filter. EP4s include