Yes, Lehigh makes the current NFPJ plugs for Knight and possibly the new FPJ plugs labeled as vented for Extremes and Mountaineers.
Lehigh also makes the bolts for Knight.
Before Knight got them Lehigh offered the conversions with removable vents like the Savage plug. Current plugs have the vents brazed in. Ive got a original prototype and 5 or 6 final release versions. Ive also got a older Knight NFPJ which is pretty bad with BH209.
No need for a mag primer in the Lehigh bare primer plugs, at least not with the originals. They were made for the dimensions of the Win209 and very well tested.
