this post was submitted on 07 Dec 2025
3 points (100.0% liked)

Help & Support

185 readers
9 users here now

Post here if you have general questions concerning GunCAD, printing, or otherwise fabricating DIY firearms. Newbies are welcome, but users are encouraged to read Ctrl+PEW's Getting Started Guide if they haven't already.

Shitty stock image may be changed at moderator discretion.

founded 2 months ago
MODERATORS
 

I'm getting the quirks worked out on 3 position binary which uses a M16 3 round burst trigger and two disconnectors.

  1. Sarco is the only place I've found that sells the triggers individually and the sear surface on theirs looks like ๐Ÿ’ฉ. Any other vendors that will sell the 3 round burst parts individually?

  2. Are the 3 round disconnector springs the same as standard AR disconnector springs? I couldn't find any 3 round specific springs and used AR springs. They work but they don't seat well and I can feel the coils rubbing/ binding when manually compressing the disconnector. You can see it in the right side disconnector.

top 2 comments
sorted by: hot top controversial new old
[โ€“] AlexPhoenix 1 points 10 minutes ago (1 children)

like an scs discobin? doesn't kak sell the m16 LPK? idk where to find burst parts but kak has the dual disconnector triggers and 3 pos selectors i believe.

[โ€“] stickygumm_01 1 points 1 minute ago

This is a SCS cut binary disconnector and a M16 disconnector in a 3 round burst trigger. The AR disconnector springs don't seat well.