AR-15 Acronyms O - Gun Accessories
OAI - Olympic Arms, Inc. (manufacturer of various AR-style rifles - Gun Accessories)
OAL - Overall Length
OBO - Or best offer
OD - Olive Drab (that green color the army is so fond of)
OD - Outside Diameter
OEG - Occluded Eye Gunsight (a sight that projects a dot to the […]

AR-15 Acronyms S- Pistol Grips
SAAMI - Sporting Arms and Ammunition Manufacturers’ Institute (an association of manufacturers of sporting firearms, ammunition, and components. Often used to distinguish between the sporting .223 chamber [the SAAMI chamber] and the military 5.56 mm pistol grips ) […]

AR-15
In December of 1959, Colt acquired manufacturing and marketing rights to the AR-15. In 1962 Colt was able to get the Department of Defense’s Advanced Research Project Agency (ARPA) to test 1,000 weapons in its Vietnam-oriented Project Agile. An enthusiastic report led […]

AR15
In December of 1959, Colt acquired manufacturing and marketing rights to the AR15. In 1962 Colt was able to get the Department of Defense’s Advanced Research Project Agency (ARPA) to test 1,000 weapons in its Vietnam-oriented Project Agile. An enthusiastic report […]

Rifle Scopes
Telescopic rifle scopes sights are classified in terms of the optical magnification and the objective lens diameter, e.g. 10 50. This would denote 10 times magnification with a 50 mm objective lens. In general terms, larger objective lens diameters are better […]

Ghillie suit
Snipers and hunters with extreme requirements for camouflage use a ghillie, or yowie suit. The ghillie suit was originally developed by Scottish gamekeepers as a portable hunting blind. The name derives from ghillie, the Scots Gaelic for “boy”, in […]

AR-15
In December of 1959, Colt acquired manufacturing and marketing rights to the AR-15. In 1962 Colt was able to get the Department of Defense’s Advanced Research Project Agency (ARPA) to test 1,000 weapons in its Vietnam-oriented Project Agile. An enthusiastic report led […]

Rifle Scopes

Until the 1990s, military use of telescopic Rifle Scope was restricted to snipers because of the fragility of optical components, though they had been used as early as the American Civil War on rifles, and even earlier for other jobs. The glass lenses are prone […]

AR-15
In December of 1959, Colt acquired manufacturing and marketing rights to the AR-15. In 1962 Colt was able to get the Department of Defense’s Advanced Research Project Agency (ARPA) to test 1,000 weapons in its Vietnam-oriented Project Agile. An enthusiastic report led […]

AR-15
A. Origins. The AR-15 Rifle was designed by Eugene Stoner and his team of engineers in the 1960 s for entry into U.S. military trials for a new battle rifle to replace the M-14. Mr. Stoner, working at the time for ArmaLite (a division of the […]