AirMaks Arms Airmak krait plenum leak

Verified leaking at both ends of the plenum how or what method did U use to identify the leaks? O-Ring 17x2 90NBR ? Did you apply some silicone lube?
Definitely the plenum. Yes loads of silicone lube it's like they to big an just cut up wen screwing in. It's even hard just to push in before you even start tightening up. He bought a seal kit maybe just order them seals on it own from somewhere else