Hey Guys,

I'm going through a build and scratching my head not. I installed the Primary Weapon Systems Enhanced Buffer Tube Mod 2 to an American Defense UIC Lower. The PWS EBT would not rotate any further in to the American Defense Lower when I torqued it down. I'm using a Bravo Company Bolt and Bravo Company barrel (headspace has been checked). The JP silent captured spring system is not making contact with the bolt. Per JP's instructions I do not have a buffer retainer plunger installed. I placed one quarter in to adjust fitment, again per JP and still had space, instructions stated it should not take more than 1. I have 3 quarters installed prior to getting correct fitment.

JP spring in a colt le6920 is fine which makes me think its the tube. thoughts?

In case anyone else is considering the combo...

The PWS Tube has extended lips at the base to reduce carrier tilt on piston setups. The ADM receiver also has a raised lip. Obviously not enough space for both. If using a mil spec tube you'll have no issues.