New Upgrade Parts ProteK 1/8 NPT US stainless steel male coupling ProteK €4.00 -Ideal for creating an HPA supply line from a Mamba or any other line fitted with a 1/8 NPT female thread. -Ideal for converting GBBR gas magazine to HPA or replacing the coupler on your HPA adapter. -CNC machined in stainless steel. -We recommend using Teflon tape on the thread to seal when tightening. -US version (only compatible with an US HPA... Add to cart