Dead Air DA205 Front Cap R-Series 6.5mm
https://www.tandktactical.com/shop/810128160940-dead-air-da205-front-cap-r-series-6-5mm-40546
https://www.tandktactical.com/web/image/product.template/40546/image_1920?unique=d9db258
This front cap allows to fine-tune the sound performance, flash mitigation, and backpressure of the silencer.
