June 17, 2026
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Bill Marr's journal of shooting, reloading and gunsmithing

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What's new?
  • [ January 26, 2025 ] 782 Custom Gunworks “HUNDO” Loading Block Editorial
  • [ January 26, 2025 ] How do rifle suppressors affect muzzle velocity? Precision Rifles
  • [ May 31, 2023 ] The A-Team Mini-14? Customizing a Ruger Mini-14 A-Team
  • [ April 30, 2023 ] Removing stripped and sheared screws from a rifle Gunsmithing
  • [ February 28, 2023 ] Cut and Crown a Winchester 94 30-30 Gunsmithing
HomeUSMC M40A3 Build

USMC M40A3 Build

Precision Rifles

308 Winchester 175 Sierra MatchKing and IMR 4064 load development

January 11, 2016 Bill Marr 0

308 Winchester load development with the Sierra 175 grain MatchKing (SMK) and IMR 4064 Powder. In this post, I’ll be developing a load for my M40A3 clone.  Built on a customized Remington 700 receiver, the […]

Gunsmithing

Building a USMC M40A3: Cloning the Marine Corps Sniper Rifle from 1999-2009

January 4, 2016 Bill Marr 0

In this post Rifleshooter.com will build a clone of the United States Marine Corps M40A3 Sniper Rifle. Replacing the M40A1 in 1999, and used by the Marines until 2009, the M40A3 is characterized by its […]

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AR15 Magazine Upgrade

Accessories
October 29, 2012 0

Lapua 6.5 Creedmoor Brass: Forming 6.5 Creedmoor cases from 22-250 brass

6.5 Creedmoor
November 2, 2015 0

Installing a bead on a shotgun barrel

Gunsmithing
February 7, 2019 0

USMC M40A5 Build- Part 4: Threading and chambering the barrel and brake installation

Gunsmithing
July 13, 2015 0

Brownells Gunsmith Conference and Career Fair

Gunsmithing
April 21, 2013 0
308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28" to 16.5")
6.5 Creedmoor- Effect of Barrel Length on Velocity: Cutting up a Creedmoor!
Budget precision rifle: Customizing the Savage Axis
Ruger American Rifle Predator 223 Review
223 Remington/ 5.56mm NATO barrel length and velocity: 26 inches to 6 inches
Howa 1500 Review
Completing an 80% 10/22 Select Fire LLC RAZOR Semiautomatic Receiver
338 Lapua Magnum: Barrel Length Versus Muzzle Velocity (30-17 inches)
300 Winchester Magnum: How Does Barrel Length Change Velocity- A 16" 300 Win Mag?
USMC M40A5 Build- Part 1: Gathering the Parts

BAT Machine’s Model VR 2-Lug Short Action Repeater: A Remington 700 Size Action

PSA: Don’t melt your MagnetoSpeed with a suppressor!

Skim bedding and pillar installation on a Remington 700

Review: Maxim Defense CQB Stock


 

 

 

 

 

308 Winchester 175 Sierra MatchKing and IMR 4064 load development

January 11, 2016 0

Howa 1500 Review

November 27, 2017 0

Make an old Remington 870 better than new: Wilson Combat’s Remington 870 Steal

July 19, 2015 0

How to cut and crown a rifle barrel and install a brake

April 7, 2014 0

The need for speed: Red dot vs ghost ring sights on a shotgun.

August 16, 2013 0

Armalite AR-30 muzzle brake installation

June 9, 2019 0

Filling a Dovetail Sight Notch with a Blank

October 21, 2012 0

McMillan’s stock making and gunsmithing videos

February 12, 2015 0

Remington 870 rebuild- from hunting ducks to home defense

May 5, 2014 0

Improved belt sander table (tooling plate)

March 22, 2019 0

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Recent Posts
  • 782 Custom Gunworks “HUNDO” Loading Block
  • How do rifle suppressors affect muzzle velocity?
  • The A-Team Mini-14? Customizing a Ruger Mini-14
  • Removing stripped and sheared screws from a rifle
  • Cut and Crown a Winchester 94 30-30
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