Okla. Stat. tit. 21, § 1289.3
DEFINITIONS FOR FIREARMS ACT
"Pistols" or "handguns" as used in the Oklahoma Firearms Act of 1971 and the Oklahoma Self-Defense Act shall mean any firearm capable of discharging single or multiple projectiles from a single round of ammunition composed of any material which may reasonably be expected to be able to cause lethal injury, with a barrel or barrels less than sixteen (16) inches in length, and using a combustible propellant charge, but not to include any firearm with an overall length of twenty-six (26) inches or more, flare guns, underwater fishing guns or blank pistols.
Laws 1971, HB 1248, c. 159, § 3, emerg. eff. May 24, 1971; Amended by Laws 1995, SB 3, c. 272, § 41, eff. September 1, 1995; Amended by Laws 2017, SB 36, c. 13, § 1, eff. November 1, 2017 (superseded document available); Amended by Laws 2019, SB 24, c. 63, § 1, eff. November 1, 2019 (superseded document available).