TEC-22 Knowledge Base - Projects - Audio Artillery

TEC-22 Knowledge Base

  1. Intro
  2. Types of issues
  3. Install a new extractor
  4. Polish the hammer
  5. Chamber damage
  6. Magazines
  7. Ammunition
  8. Replacement parts
  9. California compliance parts
  10. Adding a rail

1: Intro

You're here for a reason. For some reason or another you came into possession of what some will tell you is the least reliable gun on the planet, the Intratec TEC-22. The TEC-22 is, however, a very simple design and there are some things you can easily tweak to get it running right.

Most of the info on this page comes from other sources, notably this forum post. I just wanted to get it all written down in one place.


 

2: Types of issues

I've mainly been plagued by stovepiping with this gun. The spent case ends up getting jammed in the ejection port. I'm not sure I've ever seen an extraction issue. The two types of failures can be inter-related; spend more energy extracting a case and there's less to spend on ejection..

One other odd issue I see at random is the top cover opening during firing. My theory is that for some reason the bolt returning forward after firing causes the cover release to temporarily slide forward enough to release to the top. Nothing negative seems to happen due to this, but it is suprising/disturbing when it happens.


 

3: Install a new extractor

I haven't seen much in the way of extraction failures but extractors are cheap since the TEC-22 reuses the Ruger 10/22 extractor design. Get a Volquartsen extractor and install like you would on a 10/22.


 

4: Polish the hammer

This one surprised me. When the bolt moves rearward it rides along the length of the hammer as it cocks the hammer. Take a close look at your hammer. That surface is probably not the smoothest part you've ever seen. Mine had horizontal machining marks that made it quite rough. Take some 220 grit sand paper and get those marks out, then use 320, 400, and 600 grit paper to get it smooth. You can go higher but I doubt it will make a difference.

I had chronic ejection failures until I did this. Do it.


 

5: Chamber damage


(click for full size)

Over time the extractor slamming against the edge of the chamber mouth rolled over a burr on the edge of the chamber. This could cause extraction issues but an ejection issue is more likely -- more energy is requried to extract so ejection is less forceful.

Small hobby files make quick work of this burr. I expect it will build up again over time.


 
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