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Old October 9th, 2017, 07:48 PM   #1
clandestine


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Custom Made - M16/Fostech Echo II Auto Sear/Trigger Safety Gauges

I made this set for my Son so he can be sure his M4A1 Sear/M16 Carrier is timed properly.

This also has use for those civilians with Registered M16 Receivers and Drop in Auto Sears. These Gauges will also tell you if your Fostech Echo II Trigger Safety (Safety Sear) is timed properly with the M16 Carrier.

Took me about 4 hours to make them.

Early Gauge
Good Gauge
Late Gauge
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Old October 10th, 2017, 03:07 PM   #2
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Nice! I only wish I had a dias to test with...


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Old October 10th, 2017, 03:09 PM   #3
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Saw these on IG, very cool!


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Old October 10th, 2017, 09:17 PM   #4
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Thanks gentlemen.
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Old October 10th, 2017, 09:46 PM   #5
hit3961
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Quote:
Originally Posted by clandestine View Post
I made this set for my Son so he can be sure his M4A1 Sear/M16 Carrier is timed properly.

This also has use for those civilians with Registered M16 Receivers and Drop in Auto Sears. These Gauges will also tell you if your Fostech Echo II Trigger Safety (Safety Sear) is timed properly with the M16 Carrier.

Took me about 4 hours to make them.

Early Gauge
Good Gauge
Late Gauge
Looks like a project for my cnc
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Old October 10th, 2017, 10:03 PM   #6
clandestine


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Quote:
Originally Posted by hit3961 View Post
Looks like a project for my cnc
Im sure the CNC would throw them out fast. Took a long time on the manual lathe.

Im still plannning on perfecting the design. Im going to add an O-Ring to keep the Gauge in the Carrier and I need to make a Dummy Firing Pin to use the Gauge properly.
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Old October 10th, 2017, 10:22 PM   #7
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Quote:
Originally Posted by clandestine View Post
Im sure the CNC would throw them out fast. Took a long time on the manual lathe.

Im still plannning on perfecting the design. Im going to add an O-Ring to keep the Gauge in the Carrier and I need to make a Dummy Firing Pin to use the Gauge properly.
There all the same dimensions Other then the back end? So if you mass produced the early gauge you would just need to take a couple thousand
Of for the rest?
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Old October 10th, 2017, 10:29 PM   #8
clandestine


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Originally Posted by hit3961 View Post
There all the same dimensions Other then the back end? So if you mass produced the early gauge you would just need to take a couple thousand
Of for the rest?
The main bodies all have the same length and diameter. The face thickness has the variances.

The thickness of the faces are as follows:

.080
.100
.120
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Old October 10th, 2017, 10:43 PM   #9
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Quote:
Originally Posted by clandestine View Post
The main bodies all have the same length and diameter. The face thickness has the variances.

The thickness of the faces are as follows:

.080
.100
.120
Thanks sure beats the feeler gauge method.
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Old October 11th, 2017, 10:16 AM   #10
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Couldn't these be made as rings to be dropped down over the assembled bolt? (or a C-clip shape) Just point the muzzle up to use on an assembled bolt. Would take no modification to the firearm to test.


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