PopStop™ is a proprietary device that eliminates what is commonly known as first round pop (FRP) in suppressors. First round pop occurs when oxygen contained in a “cold” suppressor is ignited by hot propellant gasses. With certain suppressors, first round pop can account for nearly twice the impulse noise as the subsequent shot through the same suppressor. PopStop™ interfaces between barrel and suppressor and utilizes a valve that allows for an injection of inert carbon dioxide into the suppressor via commonly available carbon dioxide cartridges and handheld tire inflators. The result is a suppressor purged of flammable gas (oxygen) and replaced with an inert gas (carbon dioxide). We’ve tested the effects of PopStop™ as lasting up to five minutes with a one second injection. The effects can last even longer if a sticker is used to seal the end of the suppressor post-injection.

Using a calibrated Larson Davis LxT-1 sound impulse meter our testing yielded a reduction of up to 9 dB by utilizing PopStop™. Additionally, PopStop™ eliminates suppressor flash associated with FRP and can act to cool down the suppressor which helps reduce the POI shift commonly observed with certain suppressors.

PopStop™ will be available in 1/2-28 and 5/8-24 thread pitches and will be offered in grade 5 titanium and 17-4 heat treated stainless steel.

Coming end of Summer 2017

Prototype PopStop™ shown with COTS carbon dioxide inflator

Stainless steel prototype pictured. The production version is thoughtfully designed in Solidworks® by a seasoned design engineer.

dB readings attained with a Larson Davis LxT-1 sound impulse meter using a bolt action 308WIN with subsonic rounds and YHM Phantom LT suppressor.

Prototype PopStop™ attached to an AR-10 during supersonic endurance testing.