Originally Posted By MAKAK47:
where can you get a jam nut?
offers several different ones, as does JP Rifles.
For M14x1 LH, CNC Warrior offers the ones below, other thread pitches are available as well.
tork like hell worked for mine... threading is a little long for the tapco birdcage but i got it free and didnt like the razor.. the PSL break I cut down and it lined up 99% perfect!