EFK Five Seven 5.4" Threaded Barrel
EFK Five Seven 5.4″ Threaded Barrel
July 6, 2016
SilencerCo Omega 9K
July 6, 2016
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Stainless steel adapter comes with standard 10x1mm Rh thread to 1/2×28 RH threads for use with the Silencerco .22 Sparrow or Spectre II (not needed with the Gemtech 5.7 suppressor). This adapter comes in black with matching thread protector.  It’s BLACK!

Out of stock


This EFK 5.7 THREAD ADAPTER will make the 10mm barrel 1/2 x 28 and suppressor ready.

Not needed if you have a proprietary 10mm threaded silencer like the Gemtech or Elite Iron.

The adapter is absolutely required to use your 1/2 x 28 suppressor on this gun.

Ships free with your EFK Barrel Purchase.

Take special care to have the tools needed to secure and remove this from your barrel.  Often times, the threads you least desire to come undone are the ones that do.  A dab of pre-cured blue loctite applied to the 10mm barrel  will hold the adapter on with greater resistance than the suppressor meets when you remove it, hopefully ensuring the suppressor will come off the adapter rather than taking the adapter off the barrel with it.  These are the breaks when it comes to suppressors and adapters.  DON’T USE RED unless you have the desire to wield a blowtorch and vice grips.

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Additional information
Weight .3 lbs
Dimensions 6 × 4 × .5 in


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