The RCA Museum also features an outdoor Gun Park with over thirty artillery pieces and vehicles and runs two temporary exhibits yearly in the Gregg Gallery.

However, it took roughly two decades to acquire the necessary approval to establish a Regimental Artillery Museum in Shilo, Manitoba.

Since the 1940s, Shilo was primarily a training base, headquarters for the RCA, and home of the Royal Canadian School of Artillery (RCSA).

Colonel Bailey recommended using a portion of those funds annually to establish an "RCA Memorial Museum."

In June 1956, Colonel Brown requested allocation through Shilo Base Command of Building L1, the old RCA Officer's Mess, as a suitable location for a new centralized Artillery Museum.

The Commander of Shilo Garrison, Colonel J. M. Houghton, approved the request but delayed any potential development of the RCA Museum until establishing a new mess.

In 1964, staff moved the collection to Building C2, a small WW2 H-Hut, which provided more room for growth with approximately 2,000 square feet of display space.

In the late 1990s, base safety condemned the RCA Museum, Building A12, due to old age and water damage, which justified a more prominent location.

Base Command approved a sizeable, heated warehouse, Building M101, to store guns, vehicles, and artifacts beginning in 2009.