• Hi Guest. Welcome to the new forums. All of your posts and personal messages have been migrated. Attachments (i.e. images) and The (Old) Classifieds have been wiped.

    The old forums will be available for a couple of weeks should you wish to grab old images or classifieds listings content. Go Here

    If you have any issues please post about them in the Forum Feedback thread: Go Here

Engineering question - to helicoil or not to helicoil

Lozart

Supporters
Joined
Jun 24, 2013
Messages
8,493
Reaction score
4,941
Last game out I lost the gas plug from the front of my Cyma M14 Socom. Cue much searching of the inetrwebs and the only replacements I can find are the PDI ones that purport to be for the TM M14 range.

So I splash out on both the regular and short gas plugs along with a Smith Enterprises front sight (if you know you know) BUT the PDI gas plugs are not the same thread as my various M14s (one ASG/Cyma longboi, Cyma M14 Socom and a Cyma EBR Mod 1). After much fiddling with my digital calipers the PDI ones appear to be M10 x 1.25 but the original ones are M10 x 1.12 (possibly M10 x 1.0). The question is - do I drill it out and fit an M10 x 1.25 helicoil or just try and push an M10 x 1.25 plug tap down and hope there's enough meat for the thread to form?

What say you, engineering types?

 
Back
Top