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  #1  
Old 04-05-2008, 11:39 PM
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Default Rail Install - New Build

Okay... (Randall should chime in real soon to bail me out again. )

I have a LMT Carbine 16" upper, front sight installed.

I have a YHM one piece free float rail I want to install. The rail install I can do, but I just have not seen a clear cut instruction sheet on removing the front sight and reinstalling it.

Anyone have this instruction list? I searched a bit, but I think I have the wrong string.

Here is the build so far:



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Old 04-05-2008, 11:46 PM
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Knock out the 2 pins holding the front sight on.
Remove the flash hider/compensator.
Slide the front sight off the barrel.
Knock out the roll pin holding the gas tube into the front sight.
Separate the gas tube and the front sight.
Begin installing the YHM handguards.

About 40% down the following webpage is step by step instructions with pictures on how to do all this plus installing the handguards. It is titled "Install your own free-float rail system, step by step:".

http://ar15.com/forums/topic.html?b=3&f=4&t=226782
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Last edited by Josh3239; 04-05-2008 at 11:49 PM..
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Old 04-05-2008, 11:48 PM
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Thanks for the quick reply.

I tried to punch out the pins, but they seems to be in solid.

They can be pushed out either way right?
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Old 04-05-2008, 11:53 PM
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Quote:
Originally Posted by Josh3239 View Post
KAbout 40% down the following webpage is step by step instructions with pictures on how to do all this plus installing the handguards. It is titled "Install your own free-float rail system, step by step:".

http://ar15.com/forums/topic.html?b=3&f=4&t=226782
Thanks - I see it says "It will take the most force just to break the pins loose... once they are loose, we can use the small punch to tap them all the way out:"

... so I guess they are not going to come out too easy. When I tried, I just didn't want to mark up the pins, but I guess more force is needed.

Thanks again.
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Old 04-05-2008, 11:55 PM
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Quote:
Originally Posted by s2000news View Post

They can be pushed out either way right?
NO!!!

Most are tapered. Most tapered pins you knock out from the left side but check and make sure.

On one of my uppers the FSB was pretty much seized by rust and I had to dremel it off.


EDIT: and yes, they will require significant force.
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Old 04-05-2008, 11:56 PM
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Your going to need a punch and a hammer. Alot of guys like to use blocks of wood to support the barrel, but I never bother with that.

I thought I heard that LMT uses straight pins, meaning they can come out either way. Most companies use taper pins, meaning they can only come out from one side. If they are tapered, lLook on both sides of the front sight and determine which side of the pins are smaller. It should be the left side, and the pins must be knocked out from left to right.
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Old 04-05-2008, 11:59 PM
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Quote:
Originally Posted by s2000news View Post
Thanks - I see it says "It will take the most force just to break the pins loose... once they are loose, we can use the small punch to tap them all the way out:"

... so I guess they are not going to come out too easy. When I tried, I just didn't want to mark up the pins, but I guess more force is needed.

Thanks again.
Tape up the front sight base and barrel if your afraid that you may scratch them.

Honestly, I have had pins that took me a looong time to knock out and I have had pins that I have knocked out with a couple large throws of the hammer. I have never come across pins that needed to be dremeled in anyway. They are easier to remove the more you do them, that is for sure.
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Old 04-06-2008, 12:27 AM
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Push pins and hammer I have. Scratches I don't want.

But I will work on it tomorrow, either before or after the range. Nice thing about this upper, its my 3rd build... not in a hurry this time.
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Old 04-06-2008, 10:24 AM
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Edited for completeness:

Quote:
Originally Posted by Josh3239 View Post
Knock out the 2 pins holding the front sight on.
Remove the flash hider/compensator.
Slide the front sight off the barrel.
Knock out the roll pin holding the gas tube into the front sight.
Separate the gas tube and the front sight.
Throw away YHM handguards
Install LaRue or Daniel Defense Lite rail

About 40% down the following webpage is step by step instructions with pictures on how to do all this plus installing the handguards. It is titled "Install your own free-float rail system, step by step:".

http://ar15.com/forums/topic.html?b=3&f=4&t=226782




Actually, seriously, why not the Daniel Defense OMEGA?

You're going to have to hack away your Delta ring, unless you bought the "handguards" and not the free float rail....
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Old 04-06-2008, 11:16 AM
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Quote:
Originally Posted by uclaplinker View Post
Edited for completeness:



Actually, seriously, why not the Daniel Defense OMEGA?

You're going to have to hack away your Delta ring, unless you bought the "handguards" and not the free float rail....
YHM is just a good as I can see. Mil spec is Mil spec. I installed a YHM free float before, just used the wrench to remove the D-rings. No hacking required.

This is a free float, not hand guards. I'll take a pic of the rings for ya... show you they were not destroyed.

Seriously...(no pun) Why do you think Daniel Defense is better than YHM? I have seen a DD and MI rail in person. I mean, they function the same way.
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  #11  
Old 04-06-2008, 2:06 PM
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I got to agree with UCLAplinker. YHM is just lower quality when it comes to free float rails. To put it simple, you get what you pay for. If you have the YHM wrench they'll work fine, if not you better get one.
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Old 04-06-2008, 4:20 PM
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Quote:
Originally Posted by s2000news View Post
YHM is just a good as I can see. Mil spec is Mil spec. I installed a YHM free float before, just used the wrench to remove the D-rings. No hacking required.

This is a free float, not hand guards. I'll take a pic of the rings for ya... show you they were not destroyed.

Seriously...(no pun) Why do you think Daniel Defense is better than YHM? I have seen a DD and MI rail in person. I mean, they function the same way.
I'm no fan of MI, either...

DD>YHM?

Fit/finish, feel (smoothness), width (narrow), weight, specs (YHM rail panels I had on my original Carbine were WAY off... I couldn't fit anything on them), barrel nut and mounting design.

If you're ok with them, then you're cool. I think they're huge, uncomfortable and cumbersome. They're also pretty heavy.
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Old 04-07-2008, 1:39 PM
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Yeah, YHM railed handguards get pretty mixed reviews over at arfcom, and are frequently cited as being out of spec, plus there have been a few instances of the anti rotate pin hole egging out. MI gets better feedback in that price range, but are still big and clunky.

DD, on the other hand, has very few detractors, especially for the Omega rail. It's got some issues with rail covers, I understand, but everyone loves their Omega rails. It's right up there with LaRue as one of the most popular premium rails.
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Old 04-07-2008, 6:46 PM
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While were on the subject, what do you guys think of Troy? I was thinking of picking some up but only have experience with YHM, a poor experience by the way.
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Old 04-07-2008, 9:18 PM
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I have the one YHM rail, nothing other from YHM. So far no issues, everything mounts on, looks clean and added the guards no problem. But I hear what you guys are saying.

So far, I have had no reason to go elsewhere, and the price is so much less.
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Old 04-08-2008, 12:09 AM
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We were discussing free float rails

Quote:
Originally Posted by WARDOG View Post
TROY, ARMS, PRI, LaRUE all make fabulous back up iron sights (BUIS).
But before you by look at each site and what you will be doing with it. MOST BUIS's are not for precision iron site shooting. They have coarse windage adjustments so you will not be using those for National Match Comp's.
Also make sure that in their folded down position, they will be low enough for whatever optice you are using now, and in the near future, that will be above them.
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Old 04-08-2008, 8:20 AM
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Troy railed handguards have a very good reputation as well, right up there with DD and LaRue.
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Old 04-28-2008, 12:58 AM
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You gotta PM me when you need me because sometimes I don't catch every thread...

LMT uses straight pins.
You can push them out from either side.

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