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Thanks to a former OIC of the USMC sniper school
|Caliber||7.62x51mm NATO (.308 Win)|
|Weight||14.45 lbs (6.57 kg)|
|Barrel Length||24 inches (610mm)|
|Lands and Grooves||6|
|Twist, Right Hand||1:12"|
|Trigger Weight||3 to 5 pounds|
|Magazine Capacity||5 rounds|
|Sight||Unertl 10x with Mil-Dots and BDC. Specially designed for USMC|
|Stock||McMillan fiberglass A1 with epoxy filler|
|Chamber Pressure||50000 psi|
|Muzzle Velocity||M118: 2550fps (777mps)
M118LR: 2580fps (786mps)
|Max Effective Range||1000 yards (915 meters)|
The M40A1 is an outstanding system, very capable of extreme levels of accuracy, though the older M118 ammo tended to hold the rifle back to about 1 MOA, but the new M118LR (designed by the USMC) really unleashed the potential of these rifles with accuracy improving to about .5 MOA. The Max Effective range of the M40A1 is listed at 800 meters by a lot of sources, but the USMC says 1000yards (915 meters) and I would have to go with the USMC on this one, as we routinely shoot past 900 meters with our M24 SWS, and the M40A1 is everybit as accurate.
The USMC has replaced the aging M40A1's with the new M40A3's. A rifle that has been in the developement stages for some time now. The M40A1's have served extremely well for many years (over 30). She'll be missed, but the A3 is a capable successor.
For those of you who would like to purchase a M40A1 for your own collection, several manufacturers make excellent reproductions of the M40A1, some even built to mil-specs. But you cannot purchase an ORIGINAL M40A1.