gunstock, tactical stock, mcmillan rifle stock

How was the A-5 developed?

Gale McMillan, founder of McMillan Fiberglass Stocks, partnered with the Marine Corp in 1975 in a project that has been recognized as the birth of the modern tactical rifle, the M40A1. Made of fiberglass, with a heavier than normal forearm and traditional hunting lines aft, this stock is still in service with many units.


Over the years, McMillan Fiberglass Stocks worked closely with the nation’s elite military marksmanship units to develop refinements for their specific needs. The A-2 was originally developed for the FBI’s Hostage Rescue Team and is current issue for the US Navy Seals. The A-3 was developed in response to the FBI’s request for a lighter version of the A-2. It is currently used by the FBI, Department of Justice, Department of Energy, Department of Treasury, Department of Customs and many law enforcement organizations around the world. The A-4 is current issue on the Marine Corp’s M40A3 rifle.


There is a healthy competitive attitude between the nation’s elite tactical marksmanship organizations, and all are passionate about what they feel is important when designing a tactical stock for their teams. In this environment, it is inevitable that the question is raised, “What would be the ultimate tactical rifle stock?” Kelly McMillan, president of McMillan Fiberglass Stocks not only polled the finest from our nation’s elite units, but also took the discussion public on the Internet through the website


“Here is the consensus,” reports McMillan. “Shooters wanted a wider Winchester Marksman style beavertail forearm, the smaller pistol grip of the McMillan A2, and the light weight of the McMillan A3. Some liked the butt hook of the McMillan A-4 used on the Marine’s M40A3 and some preferred a stock without, so we created a dual-purpose butt hook that is fully functional, but out of the way when not needed. Adjustability is very important, so we offer several different options in adjustable cheek pieces and butt stocks. Yet we can build the stock in one piece for those departments that prefer no moving parts.” The result is the A-5, the professional tactical stock that incorporates the most requested features from the entire A-series.


McMillan sent several A-5 prototype stocks out to top marksmanship units as well as recognized professional shooters. The feedback was excellent. The A-5 stock is now in full production.


Additional photography and product facts are available on the McMillan website at The A-5 can be purchased through your local gunsmith or by calling McMillan at (623) 582-9635.