USMCSGT0331's M40 reference threads

Here are the links the USMCSGT0331's excellent reference threads in order of appearance.

M40 green Redfield scopes, 40X bases and scope rings...

M40 range report

Our M40 clone is finally done and it's about time we go out and shoot it. First, how does it look?


M40A6 Build Guide

So the M40A6 build begins….

Barrel: Schnider .30 cal, Finishes 20" OAL This is the same barrel contour as the A3/A5, just cut to 20"...

MK13 Mod 7

- Stiller MK13 action
- P/N MK1300

- Lilja MK13
- 26"
- 1:10" right hand twist...

XM-3 build guide

- Remington 700 short action
- Serial number prefix "S"
- Clip slotted
- Iron Brigade Armory black Man-O-War...



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M40 Series Rifle
Topics: 209 Posts: 3,674
209 3,674
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Last Post: Just in case
218 3,907
Just in case
by SS85
Topics: 61 Posts: 898
61 898
“F” prefix reciever
by MikeW
Topics: 73 Posts: 1,094
Last Post: My A5 build WIP
73 1,094
My A5 build WIP
Topics: 17 Posts: 376
Last Post: M40A6 Build Guide
17 376
M40A6 Build Guide
Optics, Accessories, & Equipment
Variable and fixed magnification scopes
Topics: 144 Posts: 1,796
144 1,796
Spotting scopes, binoculars, cameras, and other observation devices
Topics: 11 Posts: 148
Last Post: MK4 Spotting scope
11 148
MK4 Spotting scope
by J!m
Image intensifiers, IR lights, lasers, and thermal vision
Topics: 4 Posts: 34
Last Post: ANPVS-2
4 34
Otherwise known as silencers, moderators, or cans.
Topics: 6 Posts: 67
6 67
External ballistics calculators, weather meters, and ranging equipment
Topics: 2 Posts: 13
Last Post: USMC BDC Turret
2 13
Slings, shooting mats, cases, bags, and all other accessories.
Topics: 37 Posts: 350
Last Post: MRT 86 slings
37 350
MRT 86 slings
Verify item to be real or a reproduction
Topics: 39 Posts: 567
39 567
Australian Special Forces
Knives and bayonets
Topics: 7 Posts: 68
7 68
Busse Special Forces
by geoff3
Armory & Workshop
Bolt action centerfire rifles built for accuracy
Topics: 139 Posts: 1,895
139 1,895
Remington factory 40x xm3
XM-3 (22/417)
M1903 (25/168)
M70 (28/462)
Mk 13 (18/250)
M24 (32/465)
M2010 (2/18)
PSR & MSR (2/8)
Semi-auto centerfire rifles built for accuracy
Topics: 39 Posts: 397
39 397
Question I cant answer....
M14 DMR & M39 (12/159)
M110 & Mk 11 (10/48)
Mk 12 & SAM-R (4/28)
M21 & M25 (11/158)
Centerfire semi-automatic rifles
Topics: 19 Posts: 149
19 149
Winchester M1 Garand
by Stevo86
M82 & M107 (2/11)
Mk 18 (4/32)
M1 Garand (12/88)
Rimfire rifles and handguns
Topics: 41 Posts: 483
41 483
Also known as scatterguns or slug guns
Topics: 4 Posts: 34
Last Post: L74a1
4 34
M870 (1/6)
M1014 (1/18)
590A1 (0/0)
Pistols and revolvers
Topics: 47 Posts: 540
Last Post: Gen 4 in progress
47 540
Gen 4 in progress
M9 (3/29)
M1911 & M45A1 (38/467)
G19 (1/6)
Firearm repair, modification, and refinishing
Topics: 32 Posts: 316
Last Post: m40 Ring set 34
32 316
m40 Ring set 34
Factory ammunition, reloading, and handloading.
Topics: 28 Posts: 293
28 293
Some M40 reloading....
Post feedback on transactions
Topics: 85 Posts: 254
Last Post: reese3303
85 254
Complete firearms for sale
Topics: 34 Posts: 181
34 181
Riflescopes and other optics for sale
Topics: 46 Posts: 197
Last Post: For Sale MST100
46 197
For Sale MST100
by SS85
Firearm related parts for sale
Topics: 134 Posts: 517
134 517
Shooting gear and equipment for sale
Topics: 19 Posts: 49
19 49
Offers to buy
Topics: 169 Posts: 684
169 684
WTB: M40 sling swivels
Looking to find the fair market value
Topics: 3 Posts: 20
3 20
Tutorials about using the site and support
Topics: 21 Posts: 166
21 166
Feedback for the site
Topics: 15 Posts: 118
15 118
DeepC Infidel
Topic thread suggestions
Local and national precision rifle match discussions
Topics: 11 Posts: 211
11 211
General discussion
Topics: 196 Posts: 1,899
196 1,899
Doesnt get much better....
by MikeW

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There are currently 74 users online. 4 members and 70 guests.

Most users ever online was 238 at 09:49 PM on 05-23-2018. Statistics


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WELCOME TO M40RIFLE.COM is a website dedicated to the iconic Marine Corps sniper rifle, USMC Scout Snipers, and the precision shooting community.
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  • The Raven
    Reply to Major information link/website...
    The Raven

    I guess I'm a little late, lol. What surprised me was the MACV historical details that it covered. The only other place I've seen any...
    08-12-2018, 09:19 PM
  • macethetemplar
    Reply to Major information link/website...
    I came across that site years ago when I was first looking for an ArTel. Has only been updated once I think but its good for the basics and some acce...
    08-12-2018, 08:27 PM
  • SemperFi
    Comment on “F” prefix reciever
    08-12-2018, 04:16 PM
  • MikeW
    Reply to “F” prefix reciever
    Are F prefix receivers "correct l" for an A3 build? I have a F and a C and I wonder which would be best for an A3 build. My G is going to be...
    08-12-2018, 02:42 PM
  • The Raven
    Reply to Major information link/website...
    The Raven
    If the forum moderators have a better place to display this link, please do. I'm not sure the M40 section is the best one.
    08-12-2018, 02:14 PM
  • The Raven
    Major information link/website...
    The Raven
    I came across this amazing information link the other day. Check it out.
    08-12-2018, 01:59 PM
  • The Raven
    Reply to Prototype Leatherwood USMC M16 scope
    The Raven
    I've managed to come across some extra information on this particular Leatherwood/Realist, U.S.M.C. Scope, 2.5 power. I was wrong, as there are 6 complete...
    <p>As a result of the Marine Corps' desire to acquire a fixed power squad sniper scope system for the M-16 rifle to replace the substandard performing Colt 3x20 scope, in 1969 the Corps requested that Leatherwood Bros. build a small number of 2.5x three taper post reticle scope for evaluation. The resulting 2.5x USMC scope system consisted of a Realist made 1" black anodized tube mounted in standard blue finish Weaver made two screw rings.</p><p>The anodized detachable M-16 handle mount was subcontracted to pre-corporate formation Military Armament Corporation principals and manufactured by SIONICS Inc in April 1969. 12 units consisted of a two mount set with the addition of a single point XM-21 attachment. The first shipment of 12 non-serialized two mount scope systems were received Nov. 1969 by USMS Colonel Officer Codispoti, Commanding Officer, Hill 55 Da Nang I-CORPS RVN. Rings and mounts finished in Sandstron 9-A were also produced to evaluate combat durability. There scopes were not serialized and had a "USMC" marking on the left side of the turret housing.</p><p>Less than 20 of these scope units were produced for USMC evaluation with an additional production overrun of 20 units, placing the total manufacture of this scope at less than 40 units.</p><p>The USMC SOP "measure the mirage angle and divide by 4 = wind velocity" was developed using this scope system. Of the two mount systems only 6 units are known to have survived.</p><p>See Peter Senich's book "The Long Range War" p. 114 and Norman Chandler's book "Death from Afar" p. 58.</p>
    08-12-2018, 01:55 PM
  • pmclaine
    Reply to Remington factory 40x xm3
    So what was up with the rifle?
    08-10-2018, 08:02 PM

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