308 bolt face, and this is no different in the M40A3. Listed here is a description of the components used in the M40A3.Īction: The M40 has always been based on the Remington 700 Short Action with. Though its designation would remain M40A3 until 2009, its exact configuration varied with time. It served in Operation Iraqi Freedom and other subsequent conflicts. ĭevelopment of the M40A3 began in 1996 and concluded in 2001, when it was placed into service during Operation Enduring Freedom. The M40A1 and A3 switched to fiberglass stocks made by McMillan, with new scopes. The original M40 was a military type-classified version of the Remington 700 it was factory-made, and had a one-piece wooden stock. The M40A5 incorporates a detachable magazine and a threaded barrel to allow for the use of a sound suppressor or other muzzle device. The rifles have had many sub-variations in telescopic sights, and smaller user modifications. New M40A5s are being built, and A1s are upgraded to A3s and A5s as they rotate into the armory for service and repair. Įach M40 is built from a Remington 700 bolt-action rifle, and is modified by USMC armorers at Marine Corps Base Quantico, using components from a number of suppliers. The changeover to the A1 model was completed in the 1970s, the A3 in the 2000s, and the A5 in 2009. It has had four variants-the M40, M40A1, M40A3, and M40A5. The M40 rifle is a bolt-action sniper rifle used by the United States Marine Corps. Scout Sniper Day Scope (SSDS)- Schmidt and Bender PM II 3-12x50. 7 (6 lands and grooves)ĥ-round integral box magazine(M40, M40A1, M40A3)