[Cedmonds]

My scout squad has the smith enterprise MK 14 USN 18 inch gas lock front sight base with a tech sight sitting on it. The tech sight uses an sp1 style front sight post.

I'ts shooting ridiculously low. I've put the the sight post as far down as it can mechanically go and i'm still about a foot low. I can adjust the rear sight up to it which is no big deal but I'm kind of thinking of filing the front sight down. Any opinions? If I mess it up are sp1 front sight posts still relatively available?

 

[Cedmonds]

What sight did you have on it to begin with? How was your accuracy to begin with? Has it only changed after the GLFS and sight were installed?

It shoots fine, just a foot low. I can throw it up a ton of clicks and it groups fine. Before with the stock Scout Height front sight (which is taller than a standard front sight) I really only ever had to come up about 5 clicks, and it would sit their for the rest of forever for where I shoot. With the tech sight and GLFS-18 combo it needs to come up about 12 clicks on the elevation knob and probably a few more!

The GLFS-18 has a taller sight base than the GLFS-22. The GLFS-18 is ment so you can use standard m14 sights on an 18 inched barreled m14 action, which opens you up to a couple more front sight options, one of them being the tech sight. Had I known that the tech sight was going to be significantly higher than a standard m14 sight, I probably would have tried a GLFS-22 front gas lock base. In lieu of all that, the cheapest solution seems to be some work with the file.

As you can tell from my unitized gas system I have no problems hacking on the old girl, she's never gonna pass hands GI1


I grabbed a standard national match front sight out of my desk drawer (which is the proper height for this gas lock) and put it on the micrometer.

Standard height NM front sight .568 in from the bottom of the sight to the top of the post
Techsight .688 in From bottom of sight to the top of the Sp1 front sight post.

that would mean i'd need to remove damn near an 1/8th inch from that sight post to get it down around the height it needs to be.. I wonder how low it would be sitting if I switched to a GLFS-22. I like the thinner ar-15 style front sight post but for now I'll probably be switching back the the NM front sight

 

[Cedmonds]

The front post looks like it might be a common part for ar15 so shortening it would be no big deal as they are easily replaced. I would get a front post for an ar15 and check the threads against the one on the tech sight before I do any shortening. Btw where did you get the tech sight from and is still available?

Right here my man http://www.tech-sights.com/m14.htm

I went ahead and shortened the front sight, she's back to being a tact driver with 1/2 inch groups at 50 yards dead nuts bulls eye one click up from mechanical zero (bottomed out) which is PERFECT. I like my rear sight peep sitting low and not a mile high in the air. I can't say that I like the post that short, I like how thin it is but target acquisition doesn't seem to be quite as fast as it was before the post was shortened to a use able height

IN THE LONG RUN, what i'll have to do for the scout squad is sell my GLFS-18 and buy a GLFS-22, replace the Sp1 sight which I called tech sight, they will sell me one no problem. The GLFS-22 will drop the tech sight down far enough to be USEFUL on the scout squad platform.


I hope anyone who is interested in tech sights, and owns a scout or even a regular M14/M1a Heeds this warning:

Tech sights are taller than a standard sight by damn near an 8th of an inch adjusted all the way down GI3............. probably why you don't see a lot of people running them... I run one because I enjoy the thinner ar-15 front sight post a lot. Also as an added bonus if you were to put a tritium ar-15 front sight post in their you'd STILL be thinner than a NM M14 front sight GI5

This raises an interesting question though. How the eff would you run one on a standard length (which is what they are designed for) and NOT have to jack your elevation up 12+ clicks... as it stands right now I don't see any other way to run a tech sight other than ON an 18inch squad, or an 18 inch squad in the stock front sight location or with a GLF-22. No other combination will leave you in the ball park of the correct height...

Note the GLFS-22 is the short one the GLFS-18 is taller for use of regular m14 USGI and NM sight heights on a shorter barrel. I have a spare NM front sight around here, i'll probably throw both the GLFS-18 and NM sight in the PX as soon as I get a GLFS-22 in my greasey hands

 

[Cedmonds]

I've got my GLFS traded for a standard one that should be in probably early next week, i also got the meprolight front sight post in. Unforuately the plunger that came with the meprolight doesn't fit in the tech sight, also the upper half of the meprolight that rotates so you index your tritum vial towards your face doesn't line up with the location that tech sight drilled the hole for their plunger...

I'll see if the top of the front sight rotates around under recoil. If it does i'll have to get crafty or just go back to a regular SP1 post I'll keep ya'll informed

 

[Cedmonds]

I got the shorter GLFS for the full length m14's, I snapped a picture of the tritium front sight not indexing with the plunger when the tritium is facing you. On Ar's they have the plunger on the other side of the post. I'll build a custom plunger and put a little detent on the back side of that flat around the base of the post so when when the plunger comes up it locks into the detent with the tritium facing me should be golden.

 

[Cedmonds]

I have the SA sight on mine. This thread served to make me realize that the Smith brake sight mount had raised my sight requiring an additional 5 clicks of elevation to zero it at 100yds.

My question is, how much would I need to cut that SA front post to bring the elevation back to the 10-click range and secondarily, is it something I should even worry about?

Personally if its a stock SA sight/NM sight I wouldn't worry about it. That is a very interesting observation you made about the smith's brake mount. Are you using a socom 16? If one were to worry about it.... I'd say try to make sure accurate measurements of what the stock sight's sat at, then find out where your current rig is sitting, then slowly take off the difference if you absolutely must. Getting a small part like that reparked or cerakoted is pretty cheap. My only warning is target acquisition sucks when your front sight post is cut down..

With the GLFS-22, tritium tech sight, and surefire brake she's behaving well. Still haven't got a chance to go out and do a real sight in, the weather has been consistently wrong in SE michigan for the past couple days