M40A1 Rifle
Historically Faithful Reproduction of the U.S. Marine Corps M40A1 Sniper Rifle
The B&B Firearms M40A1 Rifle is built for shooters and collectors who want a historically faithful recreation of one of the most iconic precision rifles in U.S. military history.
Built to original M40A1 specifications using original-source and original-pattern components, the B&B M40A1 recreates the rifle that helped define the United States Marine Corps Scout Sniper program for decades.
At its core is the legendary Remington 700 short action, paired with the heavy-contour match barrel, McMillan fiberglass stock, traditional internal magazine system and period-correct component configuration that gave the original M40A1 sniper rifle its unmistakable appearance and reputation.
Each M40A1 is built to order.
Current Lead Time: 6–8 Weeks
The History of the M40A1
The history of the M40 rifle begins during the Vietnam War.
In 1966, the United States Marine Corps adopted the original M40 sniper rifle, built around the Remington Model 700 bolt-action platform and chambered for the 7.62×51mm NATO cartridge.
The original M40 proved highly capable, but combat use also exposed limitations in its wood stock. Changes in temperature and humidity could cause wood to swell, warp or shift, potentially affecting the consistency expected from a precision rifle.
Marine Corps armorers at Quantico began developing an improved version of the rifle during the 1970s.
The result was the M40A1.
Rather than simply purchasing a new commercial rifle, Marine Corps armorers rebuilt and refined the M40 platform into a purpose-built sniper weapon system. The original wood stock was replaced with a rugged McMillan fiberglass stock, providing significantly greater resistance to environmental changes and hard field use.
The Remington action was paired with a heavy stainless-steel match barrel and installed into the fiberglass stock using the fitting and bedding techniques required for a precision rifle.
Marine Corps armorers also incorporated a modified steel Winchester Model 70 trigger guard and floorplate assembly rather than relying on the standard commercial Remington bottom metal.
These individually assembled rifles became the M40A1 sniper rifle.
Beginning around 1980, the M40A1 became closely associated with the distinctive fixed-power Unertl 10× USMC sniper scope, although earlier rifles were equipped with other optics including Redfield scopes.
For approximately two decades, the M40A1 served as the Marine Corps' principal bolt-action sniper rifle and became one of the most recognizable precision rifles ever fielded by the United States military.
Its basic philosophy was simple:
A proven Remington action.
A heavy match barrel.
A rugged fiberglass stock.
A dependable fixed-power optic.
And a rifle assembled for precision rather than mass production.
The M40A1 eventually gave way to the M40A3, but its influence can be seen throughout every later generation of the M40 rifle.
Today, the M40A1 remains one of the most sought-after U.S. military sniper rifle configurations among collectors, historians and precision-rifle enthusiasts.
B&B M40A1 Rifle
The B&B Firearms M40A1 is intended to recreate the classic Marine Corps rifle as faithfully as possible using components and specifications associated with the original M40A1 program.
Rather than building a modern precision rifle that merely resembles an M40A1, the objective is to preserve the characteristics that made the original rifle distinctive.
That includes the Remington short action, traditional heavy M40-profile barrel, McMillan fiberglass stock, internal magazine configuration and other period-correct details associated with the original Marine Corps rifle.
The result is a rifle designed to capture both the appearance and character of the original M40A1 sniper rifle while providing the buyer with a newly built rifle rather than a surplus or heavily used historical firearm.
M40A1 Specifications
Action
Remington Model 700 Short Action
The M40 and subsequent M40A1 were developed around the Remington Model 700 short-action receiver.
Original M40A1 rifles included both receivers carried forward from earlier M40 rifles and newly procured Remington receivers as the Marine Corps continued producing and rebuilding rifles.
Action Type: Bolt action
Action Length: Short action
Bolt Face: .308 / 7.62 NATO family
Feed System: Internal box magazine
Magazine Capacity: 5 rounds
Detachable Magazine: No
Barrel
Heavy M40-Contour Match Barrel
One of the defining components of the M40A1 is its heavy-profile stainless-steel match barrel.
Over the rifle's long service history, Marine Corps armorers used high-quality barrel blanks from respected manufacturers associated with the M40 program.
Chambering: .308 Winchester / 7.62×51mm NATO
Barrel Length: Approximately 24" original M40A1 configuration
Contour: Heavy M40 profile
Material: Stainless steel
Twist Rate: 1:12" RH
Crown: Recessed target-style crown
Muzzle Device: None
Suppressor Mount: None
Historical Appearance: Subdued matte-black finish
The heavy barrel contour provides the visual profile immediately associated with the M40A1 while also providing the rigidity expected from a precision rifle.
Stock
McMillan HTG / M40A1 Fiberglass Stock
The McMillan fiberglass stock is arguably the single most recognizable improvement separating the M40A1 from the original Vietnam-era M40.
The original M40 used a wood stock. The transition to fiberglass gave the Marine Corps a much more environmentally stable platform capable of tolerating moisture, heat, cold and hard field use without the dimensional changes associated with wood.
The McMillan design used for the rifle is commonly known today as the HTG or M40A1 stock.
Manufacturer: McMillan
Model: HTG / M40A1 pattern
Construction: Fiberglass composite
Configuration: Fixed stock
Action Pattern: Remington 700 short action
Magazine System: Internal magazine
Recoil Pad: Period-correct rubber recoil-pad configuration
Historical Finish: USMC camouflage pattern
Original M40A1 stocks appeared in several camouflage variations during the rifle's long service life, including the famous early hand-applied “smear” camouflage pattern.
Trigger
Remington-Pattern Precision Trigger
The M40A1 retained a Remington-pattern trigger system rather than adopting a modern detachable trigger module or chassis-style fire-control system.
Marine Corps armorers tuned the rifle for the predictable, clean trigger characteristics required from a precision weapon.
Trigger Type: Single-stage
Pattern: Remington
Historical Pull Range: Approximately 3–5 lb.
Safety: Remington-pattern receiver-mounted safety
Bottom Metal
Modified Winchester Model 70 Steel Trigger Guard & Floorplate
One of the details frequently overlooked on less accurate M40A1 clones is the bottom-metal assembly.
The original M40A1 incorporated a modified Winchester Model 70 steel trigger guard and floorplate assembly adapted by Marine Corps armorers for use with the Remington action.
The steel assembly offered a rugged alternative to the standard commercial Remington configuration and became an important detail of the M40A1 build.
Material: Steel
Pattern: Winchester Model 70
Configuration: Modified for M40A1 / Remington 700 use
Magazine: Internal box magazine
Floorplate: Hinged
Detachable Magazine: No
Optics (not included)
Classic M40A1 Configuration
Mounting System: USMC RTE/PWS-style mounting arrangement
General M40A1 Specifications
Model: M40A1 Rifle
Platform: Remington Model 700
Action: Bolt Action
Action Length: Short Action
Caliber: .308 Winchester / 7.62×51mm NATO
Barrel: Heavy stainless match barrel
Barrel Contour: M40
Barrel Length: Approximately 24"
Twist Rate: 1:12" RH
Stock: McMillan HTG / M40A1 fiberglass stock
Trigger: Remington-pattern single-stage trigger
Bottom Metal: Modified Winchester Model 70 steel assembly
Magazine Type: Internal box magazine
Capacity: 5 rounds
Detachable Magazine: No
Muzzle Brake: None
Suppressor Mount: None
Stock Type: Fixed
Classic Optic: Unertl 10× USMC Sniper
Historical Overall Length: Approximately 44"
Historical Weight with Optic: Approximately 14.5 lb.
Built to Order
Every B&B Firearms M40A1 is built to order.
These rifles are intended for buyers who appreciate the details that distinguish a historically faithful M40A1 rifle from a modern Remington 700 simply installed into an M40-style stock.
Because each rifle requires specialized components, fitting and assembly, production is not treated like a mass-produced inventory rifle.
Estimated Lead Time: 6–8 Weeks
Lead times are estimates and may vary depending on component availability and selected options.
Why the M40A1?
The M40A1 occupies a unique place in American precision-rifle history.
It represents the transition from the commercially derived sniper rifles of the Vietnam era to a purpose-built weapon system assembled and refined specifically for Marine Corps Scout Snipers.
Its influence continued through the M40A3, M40A5 and M40A6, making the M40A1 one of the most important rifles in the history of the Marine Corps sniper program.
For the collector, the appeal is history.
For the precision-rifle enthusiast, it is simplicity.
For the shooter, it is the opportunity to experience one of the most recognizable M40 rifle configurations ever produced.
The B&B Firearms M40A1 brings those characteristics together in a newly built rifle intended to remain faithful to the configuration that made the original famous.
Historical Reproduction Notice
The B&B Firearms M40A1 is a newly manufactured, historically faithful reproduction based upon the configuration and specifications of the United States Marine Corps M40A1 sniper rifle.
It is not represented as a U.S. Government-issued or surplus M40A1 and is not manufactured by, endorsed by or affiliated with the United States Marine Corps or Department of Defense.
