• Watch Out for Scammers!

    We've now added a color code for all accounts. Orange accounts are new members, Blue are full members, and Green are Supporters. If you get a message about a sale from an orange account, make sure you pay attention before sending any money!

Building a USMC M40A3

D

dud

Private
Minuteman
Sep 25, 2008
3
0
Hey guys,

I'm trying to build a M40A3 identical to those used by the USMC. I already have the following parts:

McMillan A4 - USMC Spec
Schneider 610 - 24in. 5 groove, 1:12" Match Grade Barrel
Badger Ordnance M5 Detachable Magazine Triggergaurd
Harris 6-9" S Series Bipod
KMW Podlock
Quick Cuff Model Two Sling from Tactical Intervention Specialists

I know the M40A3 uses the Remington 700 Short Action but does anyone know the specs on this? I'm trying to make this rifle as authentic as possible.

Is there a specific trigger used or is the factory one adjusted in house at Lejume?

What 1913 Mil Std Scope Rail is being used?

Other than optics, is there anything else I'm missing?

Any other tweaks that anyone knows about?

I appreciate everyones help
 
Re: Building a USMC M40A3

im no expert but theres plenty of info on this board. search.


6 digit serialed action, clip slotted, DDRoss base IIRC, badger rings with SIMRAD cap


any of the experts feel free to correct me, this is just what i gather from browsing
 
Re: Building a USMC M40A3

The marine corps scraped the old actions on the M40a1's in favor of fresh actions so you don't have to find a 6 digit. I believe they started with G series which are available everywhere. Check the serial code though. I could be off a little.
 
Re: Building a USMC M40A3

Give GoB a pm he has a base. and maybe a lug.
 
Re: Building a USMC M40A3

M40A3


Action-
* Remington 700 S/A, Trued, lugs lapped.
* Optic Mount holes open up to 8/40 threads
* Rear receiver bridge is milled off to accept flat bottom DD Ross mount
* Clip slotted

Trigger-
* M24 trigger

Recoil lug-
* DDRoss lug

BBL-
* Schineder Stainless Steel, 1/12 twist, 6groove. Finnished at 25"( USMC measures 24" from the recoil lug)
* 1.200x3, Finnished .925 @ 25"
* Crown- 45 degree pull back, .090" deep

Bottom metal-
* Pre 2007 M40A3s used DDRoss bottom metal
* Current M40A3s use a Badger DBM system w/ 5rnd & 10rnd mags

Stock-
* McMillan A4 molded in OD green. Spacer LOP. Saddle cheek piece. Sniper fill. 1stud, 6 flush cups.
* Inletted for Badger DBM or DDRoss
* When ordering from McMillan- ask for a USMC spec stock, with bottom metal specified.
* Pillar bedded
* Action is full length bedded with Marine tex- 1.5" BBL pad.

Optic & mounts-
* Pre 2006 M40A3s used a 1"tube fixed 10x Unertl- also made by United States Optics(MST100)
* Post 2006 M40A3s use a 34mm Schmidt&Bender PMII 3x12x50FFP, Gen2 Mildot Reticle by Premier Reticles.
* DD Ross 30MOA base
* Badger Ordnance USMC contract rings- 6 screw front ring, 4screw rear ring.
* 34mm Rings for the S&B
* 30mm w/ 1" inserts for the MST100,
* SIMRAD Cap

Current M40A3s employ a foreward mounted PVS22 mount (Bedded in the stock). These are made by PGW.(Thanks GAP!)

Sling-
Tactical Intervention Specialists
Quick Cuff Sling
Tan color

Bipod-

Harris 6-9" swivel, notched legs. KMW Pod lock.

Contacts-

Schnieder Rifle Barrels
1403 Red Baron
Payson, AZ 85541
1-928-474-2852

DD Ross Company
Medina, OH 44256
1-330-725-3032

McMillan Fiberglass Stocks
1638 W. Knudsen Dr., Suite 101
Phoenix, AZ 85027 USA
Phone 623.582.9635
Fax 623.581.3825

Badger Ordnance
1141 Swift St.
N.Kansas City, MO. 64116

PGW Defence Technologies INC
P.O. Box 41057
Winnipeg, Manitoba, Canada

Tactical Intervention Specialists
2431 Peralta Office K
Oakland California 94607
1-(510)-919-7286
 
Re: Building a USMC M40A3

7MM,
Nice rundown.
Good job setting a few straight. I'm thinking true spec will be very hard with the scope (marks) and the sling (marked) as well as that nice cert from McMillan that it is a "genuine M40A3" stock.
Chad
 
Re: Building a USMC M40A3

The stock is just that. The USMC orders exactly the same stock as you can. No cert needed.

Scope, well there are a few MTCs that are marked M8541, but that is the only difference from other MTCs.

Mike Miller(TIS Slings) just sold a lot of M40A3 contract slings.
 
Re: Building a USMC M40A3

7mm - Your the man. Thanks a lot.
 
Re: Building a USMC M40A3

Does anyone know where to get a M24 trigger?

7mm - Do you know if the receiver has to be milled to accept the new Badger Ordnance M5? The McMillan stock is specd out USMC M40A3 slotted for the badger.
 
Re: Building a USMC M40A3

This thread needs pics..........
P1020620.jpg

P1020617.jpg

 
Re: Building a USMC M40A3

The recievr has to be slotted to accept the lugged optics base, but not the m5 badger.The stock has to have the cut out for it.Some are cut out for DD Ross bottom instead of the badger m5.
 
Re: Building a USMC M40A3

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 7mmRM</div><div class="ubbcode-body">M40A3
* Clip slotted
</div></div>
Only this, M40A1 is clip slotted, M40A3 is lug slotted and the USMC Simrad cap is properly Simrad not BO, but value 500USD , so BO is perfect
smile.gif
 
Re: Building a USMC M40A3

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ITUZ</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 7mmRM</div><div class="ubbcode-body">M40A3
* Clip slotted
</div></div>
Only this, M40A1 is clip slotted, M40A3 is lug slotted and the USMC Simrad cap is properly Simrad not BO, but value 500USD , so BO is perfect
smile.gif
</div></div>
the simrad on the M40A3 if i remember correctly is from SPA defense? BO is gtg and looks identical.
 
Re: Building a USMC M40A3

Clip slotting is a generic term. Same could be said about the M40A1. Ive yet to see anyone load a M40A1 with a stripper clip.
 
Re: Building a USMC M40A3

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: thumper49802</div><div class="ubbcode-body">
the simrad on the M40A3 if i remember correctly is from SPA defense? BO is gtg and looks identical.
</div></div>
I remember Simrad Optronics Norway, buyed togheter to each KN200/250, SPA Defense as distributor make them too, but Simrad guarantees 0,5Moa only with his caps, is right, BO looks identical.


<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 7mmRM</div><div class="ubbcode-body">Clip slotting is a generic term.</div></div>
Are you sure?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: A10XRIFLE</div><div class="ubbcode-body">Its funny to see what Info is being spread arround.

1. The M40A3 is not Clipslotted. Its only "Slotted" or "Notched" to accept the Ross Lugged 30 MOA Base. As somone else pointed out the M40A1's were Clip sloted to accept stripper clips from an M-14 rifle. </div></div>
 
Re: Building a USMC M40A3

For Gods sake, its a generic term. Everyone that read the post knows exactly what I was saying. Will you be happy if I change it to "lugslotted" instead of "clipslotted"?
 
Re: Building a USMC M40A3

Happy or not happy, the perfect M40A3 list is yours, I only tried to help, for be properly perfect or complete, only this, excuse me, I didn't want criticize or ruin your work.
 
Re: Building a USMC M40A3

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Mike</div><div class="ubbcode-body">Not an accurate reproduction, so may not be applicable. Scope on loan from a great friend.

DSC00367.jpg


DSC00368.jpg


And the answer is no, the scope is not touching the base at any point. I triple checked. </div></div>


Gorgeous rifle Mike! And the scope is even more outrageous. We must have mutuals friends
grin.gif
 
Re: Building a USMC M40A3

Dud if you need a scope let me know. Have the exact one you need.
 
Re: Building a USMC M40A3

<object width="425" height="350"> <param name="movie" value="http://www.youtube.com/v/t3cJYsey15U"></param> <param name="wmode" value="transparent"></param> <embed src="http://www.youtube.com/v/t3cJYsey15U" type="application/x-shockwave-flash" wmode="transparent" width="425" height="350"> </embed></object>



Figured some more cool stuff was in order...
wink.gif
 
Re: Building a USMC M40A3

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Rob01</div><div class="ubbcode-body">Dud if you need a scope let me know. Have the exact one you need.</div></div>

Whatcha got Rob? Send me a PM.
 
Re: Building a USMC M40A3

Looks like my rifle is finally coming together.Just need the sling swivels for my TIS sling.
m40a3fromhell.jpg
 
Re: Building a USMC M40A3

Jose, that cut in the ejection port looks pretty good with the base mounted. The rifle looks great. The carpet looks clean as well, did Lazy21 loan you his vacuum cleaner.
 
Re: Building a USMC M40A3

Thanks for the carpet comment, does lazy21s carpet look cleaner?Yeah the cut with the base looks much better now,by the way a friend from louisiana fixed it.lol
 
Re: Building a USMC M40A3

Thanks 7mmRm, we need more pix of m40a3s here, keep em coming gents...
 
Re: Building a USMC M40A3

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 81sfo</div><div class="ubbcode-body">.... we need more pix of m40a3s here, keep em coming gents... </div></div>

Best I can muster at the moment- A3 & A1(less MST100)
M40A3049.jpg
 
You must log in or register to reply here.

Similar threads

ColRH7
M40A3 Scope and NV mount
Replies
3
Views
247
Stevo86
Stevo86
ColRH7
M40A3 Scope and NV mount
Replies
11
Views
839
Skunk
Skunk
1
LH Bolt handle interference with S&B PMII
Replies
10
Views
285
Nik H
Nik H
Teldershaw
Firearms Remington 700 USMC M40A5GA Precision Rifle
Replies
6
Views
3K
CStoohigh
CStoohigh
Z
M118 LR USMC vs Army
Replies
91
Views
4K
JustSendit
JustSendit
Top Bottom
Back