M40a1 build guide

[ODCMP]

Yes, some of the Unertl scopes that the CMP sold came with the Devtron Scopecoats too.

 

[Ranchhand]

I don't remember there being a standard really. I do remember hearing stories of guys getting smoked for not having a scope cover.

 

[Stevo86]

I’ve got 2 from CMP, but neither had the scopecoats. However I have seen them sell with them. This one didn’t come from CMP. Trying to remember where I got it.

 

[Jrb572]

So were the scope coats used also?

 

[Redmanss]

Ebay gets the eagle scope covers off and on. In my platoon they were privately purchased so I saw green and black.
The sock method was simple.
Cut a slit in a sock lengthwise but leave the toes and calf intact. Slip the sock over the scope through the slit. Tie the calf/opening in a knot.
The sock will now slip off and on using the cut slit.
Clear as mud?

Exactly this.

We had some of the Eagle covers but rarely used them, only when we knew we were going to be rough on the rifle like fast roping and the sort. Otherwise they were big and bulky so we didn’t care for them.

The ScopeCoat trapped moisture and caused the scope to rust. We also didn’t use them.

Green issue tube sock was 95% what we used, cut and tied as described above. Kept the bulk of the sand and sun out, all we cared about. And yes, it was something you’d get your ass smoked for not using one, nobody wanted their mildots falling off due to sun passing directly through for a length of time.

 

[Charlie112]

Mourning,
I have been on the range lately with my m40a1 and noticed my scope is moving in the rings,, yes, rings are tight and I sure as hell do not want to snap a screw off.. mount is TWOMANATTAC and seemed at first to be a good fit… what should I try and do to fix this problem.. Unertl scope…spec rifle..
Thanks in advance
Charlie112

 

[Stevo86]

Mourning,
I have been on the range lately with my m40a1 and noticed my scope is moving in the rings,, yes, rings are tight and I sure as hell do not want to snap a screw off.. mount is TWOMANATTAC and seemed at first to be a good fit… what should I try and do to fix this problem.. Unertl scope…spec rifle..
Thanks in advance
Charlie112

Contact twoman, I’m sure if it’s out of spec he will make it right. I have 2 of his mounts and haven’t had any issues

 

[Charlie112]

Contact twoman, I’m sure if it’s out of spec he will make it right. I have 2 of his mounts and haven’t had any issues

Thanks,
My scope has some wear on the tube,, thinking rings are correct, my tube is out of spec,, just thinking out loud...

 

[Redmanss]

You can try some rosin on the rings to tube surfaces, but that’s a bandaid and not a real fix.

 

[Redmanss]

Keep in mind the original Unertl scopes got abused, badly. We would have constant problems with rusting at the rings, steel tube and salt water for an amphibious force don’t mix well, so we would have to CLP that area often yet still rust would form trapped between the rings and tube, pretty ugly few I’ve seen when pulled out of the mounts and we would take a green scratch pad to them to clean it up. Add the stout recoil an A1 has and potentially loose rings and you get wear. Take a caliper to it to see just how much wear you might be dealing with.

Degrease the surfaces, light coat of rosin and torque snug enough (but of course not too much), use best judgement on it. I’d avoid any other sort of shimming material, worst case I would probably order a new undersized mount for it.

 

[Charlie112]

Keep in mind the original Unertl scopes got abused, badly. We would have constant problems with rusting at the rings, steel tube and salt water for an amphibious force don’t mix well, so we would have to CLP that area often yet still rust would form trapped between the rings and tube, pretty ugly few I’ve seen when pulled out of the mounts and we would take a green scratch pad to them to clean it up. Add the stout recoil an A1 has and potentially loose rings and you get wear. Take a caliper to it to see just how much wear you might be dealing with.

Degrease the surfaces, light coat of rosin and torque snug enough (but of course not too much), use best judgement on it. I’d avoid any other sort of shimming material, worst case I would probably order a new undersized mount for it.

COPY

 

[deltawiskey]

Thanks,
My scope has some wear on the tube,, thinking rings are correct, my tube is out of spec,, just thinking out loud...

Contact two-man, I have heard of others with this same problem with his mounts.
DW

 

[IraM]

M40A1

 

[Jrb572]

Any tricks to torquing the rings. I would love to be able to use a torque wrench on them.

 

[Stevo86]

Any tricks to torquing the rings. I would love to be able to use a torque wrench on them.

Take the BA out of the stock and torque them.

 

[Jrb572]

Take the BA out of the stock and torque them.

What bit are you using because I don’t have one that works doing that

 

[Stevo86]

What bit are you using because I don’t have one that works doing that

Buy a long Allen head

 

[FURBURNER77]

 

[FURBURNER77]

My M40A1 clone build

 

[Charlie112]

Just curious,, why build a m40a1 killer, why not an AI rifle,, building the m40a1 killer.. still sounds like a rifle from the past…..

 

[FURBURNER77]

I built mine to spec minus Unertyl, i built it csuse i like the look. And yes its a killer Pyle not a safe queen

 

[Charlie112]

I built mine to spec minus Unertyl, i built it csuse i like the look. And yes its a killer Pyle not a safe queen

Copy!!! Ditto!!!! adder,, Unertyl on board!!

 

[tokiwartooth]

.22LR Trainer I built off of a 40-X. Had to cut the barrel down, but it was a heavy, bull barrel..

After I cut the barrel, I hand crowned it with crowning reamers I purchased online.
No lathe... Not even a jerry rigged drill..... Did it all by twisting by hand..

Bedding job I did on the trainer.

crossed my mind to try and make a .22LR elevation assembly, but got sidetracked..

Made the Tube Books a couple of years back... Think I gave them all away.... Gotta check my storage unit.

Here is the M40A1 I built.... Smear stock, CMP Unertl, proper serial # range receiver, Marine Tex bedding... Forgot who clip slotted for me. Got a couple of Unertl .50 cal from the CMP for real cheap.... Broken reticles, stripped rods, bad detents, but I fixed em.
When USO did that last run of 10x's, I made friends with someone over there and had them manufacture a couple of extra
10x elevation assemblies to convert them back to 10xs.

 

[Phil McGrath]

.22LR Trainer I built off of a 40-X. Had to cut the barrel down, but it was a heavy, bull barrel..

View attachment 7919730
After I cut the barrel, I hand crowned it with crowning reamers I purchased online.
No lathe... Not even a jerry rigged drill..... Did it all by twisting by hand..

View attachment 7919737



Bedding job I did on the trainer.
View attachment 7919736


crossed my mind to try and make a .22LR elevation assembly, but got sidetracked..
View attachment 7919728


Made the Tube Books a couple of years back... Think I gave them all away.... Gotta check my storage unit.

View attachment 7919729


Here is the M40A1 I built.... Smear stock, CMP Unertl, proper serial # range receiver, Marine Tex bedding... Forgot who clip slotted for me. Got a couple of Unertl .50 cal from the CMP for real cheap.... Broken reticles, stripped rods, bad detents, but I fixed em.
When USO did that last run of 10x's, I made friends with someone over there and had them manufacture a couple of extra
10x elevation assemblies to convert them back to 10xs.

View attachment 7919731

Where have you been hiding?

 

[tokiwartooth]

Where have you been hiding?

It's a very, very long story, my friend.

 

[deltawiskey]

It's a very, very long story, my friend.

Great to see you back Toki! Outstanding 40X/ M40A1 ; )
DW

 

[D_TROS]

I put on a NRL Hunter match last weekend and wanted a drop gun stage.

COF was to run up, guess the range of the target, dial the scope to yardage and shoot. Bonus time for getting the hit.

Full spec build. Thing shoots lights out. Nosler donated the ammo (168 gr match ammo) and the 300 BDC mark lined up perfect with a center hit if you held for wind correctly. Not many people got hits on it and the target was easily 2x as large as vitals on an animal...the main reasons I hate fudds on internet bragging about 500+ yd kills...how many animals did you injure before that...

Pic is a youth shooter sizing it up. He could not get eye relief (IYKYK) so he didnt fire it.

Regards
DT

 

[FURBURNER77]

.22LR Trainer I built off of a 40-X. Had to cut the barrel down, but it was a heavy, bull barrel..

View attachment 7919730
After I cut the barrel, I hand crowned it with crowning reamers I purchased online.
No lathe... Not even a jerry rigged drill..... Did it all by twisting by hand..

View attachment 7919737



Bedding job I did on the trainer.
View attachment 7919736


crossed my mind to try and make a .22LR elevation assembly, but got sidetracked..
View attachment 7919728


Made the Tube Books a couple of years back... Think I gave them all away.... Gotta check my storage unit.

View attachment 7919729


Here is the M40A1 I built.... Smear stock, CMP Unertl, proper serial # range receiver, Marine Tex bedding... Forgot who clip slotted for me. Got a couple of Unertl .50 cal from the CMP for real cheap.... Broken reticles, stripped rods, bad detents, but I fixed em.
When USO did that last run of 10x's, I made friends with someone over there and had them manufacture a couple of extra
10x elevation assemblies to convert them back to 10xs.

View attachment 7919731

Id love to build a trainer, but 40x hard to find

 

[Jrb572]

2000 View attachment 7894237
Gi boot sock on left, eagle scope cover on right

Is this the correct type sock?

GI MENS BOOT SOCKS GREEN, SIZE 10-13, NIP, 6 PAIR | eBay

70% COTTON / 30% NYLON. THESES SOCKS ARE USED BY THE US MILITARY. S-T-R-E-T-C-H-E-S TO FIT YOUR PARTICULAR SIZE. STAR SERVICE. FREE TO E-.

www.ebay.com

 

[pmclaine]

Is this the correct type sock?

GI MENS BOOT SOCKS GREEN, SIZE 10-13, NIP, 6 PAIR | eBay

70% COTTON / 30% NYLON. THESES SOCKS ARE USED BY THE US MILITARY. S-T-R-E-T-C-H-E-S TO FIT YOUR PARTICULAR SIZE. STAR SERVICE. FREE TO E-.

www.ebay.com

You should look for an old circa 1980s wool type one.

I need to go up in my attic soon to stack some luggage.

I could check the sea bag for one without too much DNA and send it to you.

Won’t be younger than 1990.

PM an address and be patient with me.

 

[Jrb572]

You should look for an old circa 1980s wool type one.

I need to go up in my attic soon to stack some luggage.

I could check the sea again for one without too much DNA and send it to you.

Won’t be younger than 1990.

PM an address and be patient with me.

Thank you I’ll send a PM I appreciate it.

 

[Ranchhand]

I don't believe there was a special nsn for the sock. Green or black boot sock.
I was around 8541s from 97 to 2001 and saw both colors.

 

[pmclaine]

Mk1 Mod0 scope covers……

The wear at the toe and heel mean they are pre-aged authentic.

Clothing allowance was used for new socks or drinking, not scope covers.

 

[Series 70 Colt]

Mk1 Mod0 scope covers……

View attachment 7946866

The wear at the toe and heel mean they are pre-aged authentic.

Clothing allowance was used for new socks or drinking, not scope covers.

So is that a USMC return sock? Do you have the certificate? Will you split?

 

[pmclaine]

My shitty day with the state of MA had a silver lining…. @Jrb572 your socks are on the way.

Lady at PO is a trip, totally anti covid, went to a few political things with her this past winter/spring. Local tried to get her cancelled on her job and she has been with PO decades.

She got pissed because I used a mailing option I had available - priority tyvek envelope.

She was like what is this and I was embarrassed to say old socks.

She stuffed my envelope in a second envelope because it would be two dollars less to ship.

I have seen her at Christmas time save peeps big money having them repackage shit with materials she provides than brings them back to front of the line.

Example of a good public servant.

 

[Random Guy]

Built a few years ago by a retired 2112 around a painted ‘return stock’. (I added the improvised cheek pad). Old school but I like it.

 

[pmclaine]

I don't believe there was a special nsn for the sock. Green or black boot sock.
I was around 8541s from 97 to 2001 and saw both colors.

A1 lasted long enough to make it into the era of Lycra and poly blended socks but in my day when it was the hot girl in STA Platoon sporting a smear or newer woodland, socks were wool with no stretchy materials to keep their shape.

Good socks actually but I was too dumb than to know they needed a silk liner if planning on any serious use.

 

[blcouch]

After 5 years of “as newly built” condition, I decided to paint The Reyvn. Same paint techniques/colors as my MK12s and MC6SD.
Of course, I changed the mount system to the A3 (I think?) to increase comfort and shoot-ability. It made a world of difference, along with the McM installed adjustable buttplate system.

 

[tokiwartooth]

Any of you folks from the Chattanooga area? Just relocated myself down here, almost done setting up shop.
Need some recommendations on where to shoot.... (outside of my backyard)..

 

[Redmanss]

Any of you folks from the Chattanooga area? Just relocated myself down here, almost done setting up shop.
Need some recommendations on where to shoot.... (outside of my backyard)..

When I was based out of Knoxville, finding shooting spots in TN wasn’t the easiest. I did look into a private range down your way, IIRC had a 1000yd line with butts though. A google search should pull it up, if it’s still operating anyhow.

There’s another up to Oak Ridge, big one that hosts a lot of F-Class along with across the course NRA/CMP matches, would be surprised if they didn’t have something tactical LR based by now though. Need to have a member sponsor there, I was never around enough to bother going through the member process since I was working overseas then, the ex’s uncle was a member and really spoke favorable about the facility though. He shot Garand matches and cowboy action mostly, and ran pits for F-Class there.

 

[jpop8807]

After 5 years of “as newly built” condition, I decided to paint The Reyvn. Same paint techniques/colors as my MK12s and MC6SD.
Of course, I changed the mount system to the A3 (I think?) to increase comfort and shoot-ability. It made a world of difference, along with the McM installed adjustable buttplate system.

Gorgeous.

 

[Skunk]

New mst100

Not sure if its been covered but have to try. For those of us that have missed the boat of previous offers on mst100 scopes. Would there be a way to convince us optics to do another run of them or even possibly start a small batch annually. Seems as though there's enough want in the market to...

www.snipershide.com

 

[deltawiskey]

Ok, this should be interesting, I'm looking for your opinions.
What scope do you prefer on my 40X .22lr clone: Redfield M40 commemorative-Weaver T-10, or the fake Unertl made out of a Redfield 3x9?

 

[Redmanss]

Ok, this should be interesting, I'm looking for your opinions.
What scope do you prefer on my 40X .22lr clone: Redfield M40 commemorative-Weaver T-10, or the fake Unertl made out of a Redfield 3x9?
View attachment 8040198
View attachment 8040200
View attachment 8040203

If it makes any difference, I'm pretty sure it was the Weaver T-10 on the 40x trainers we used at Quantico. It's been a while, but that's what I recall.

 

[deltawiskey]

If it makes any difference, I'm pretty sure it was the Weaver T-10 on the 40x trainers we used at Quantico. It's been a while, but that's what I recall.

Thanks, that's very interesting!
It's a great scope, just a bit awkward adjusting the parallax. It is adjustable though which is a definite advantage over the other two!
DW

 

[RWSGunsmithing]

Any USMC in the field pictures of a M40A1 using a suppressor?

 

[Redmanss]

Any USMC in the field pictures of a M40A1 using a suppressor?

Earliest suppressors I knew of were on prototype A3s that were at PWS/Quantico in 2001. Never once saw or heard of a suppressed A1, but I was far from having my nose in all the happenings.

 

[FUNCTIONAL]

Any USMC in the field pictures of a M40A1 using a suppressor?

I think you might be thinking of that pic floating around of a school house A1 with suppressor. That was not any type of spec and something modified for recent use for fun and matches at Quantico.

 

[AN22]

Any of you folks from the Chattanooga area? Just relocated myself down here, almost done setting up shop.
Need some recommendations on where to shoot.... (outside of my backyard)..

Strategic Edge is about 2hr from you, great range that goes out to 1250y. Membership fees are reasonable.

 

[SSG3K]

Got her back after 18 years.