Byrna SD

Byrna Technologies Inc. · Pistol · In Production · 2021

Also known as: Byrna SD Launcher, Byrna Self Defense

Overview

The Byrna SD is a CO2-powered less-lethal self-defense pistol (launcher) that fires .68 caliber round kinetic and chemical-irritant projectiles. Introduced in 2021 as the successor to the Byrna HD, it uses a patented pull-pierce system in which the 8-gram CO2 cartridge remains unpunctured until the first trigger pull, launching a projectile at roughly 300 feet per second. Marketed as a permit-free personal-protection device, it is not classified as a firearm in most U.S. jurisdictions.

Specifications

Weight (empty)	590 g (20.8 oz)
Overall Length	165 mm (6.50")
Height	127 mm (5.00")
Width	38 mm (1.50")
Action Type	Gas Operated
Trigger Type	Double Action
Trigger Pull	31 N (7.0 lbf)
Magazine Capacity	5 rounds
Magazine Type	Detachable Box
Muzzle Velocity	91 m/s (299 fps)
Muzzle Energy	12 J (9 ft·lbf)
Effective Range	18 m (20 yd)
Barrel Rifling	None
Frame Material	Polymer
Barrel Material	Polymer

Calibers

.68 Caliber (18mm) Less-Lethal · primary — also known as .68 cal, 17.3mm fin-stabilized, FN 303 projectile

Features

Firing modes: Semi Automatic
Feed systems: Detachable Box Magazine
Safety mechanisms: Manual Safety, Trigger Safety
Features: Co2 Powered, Pull Pierce Co2 System, Accessory Rail, Ambidextrous Safety, Removable Magazine

Production

Production years: 2021-present

Byrna's best-selling less-lethal launcher; exact production figures not disclosed

Origin

Country of origin: United States

Notes

Feeds from a 5-round detachable magazine; a single 8g CO2 cartridge delivers roughly 20-22 shots. Sold in kinetic and pepper/irritant projectile kits. Round ball projectiles produce essentially no recoil.

Background

Byrna Technologies (formerly Security Devices International) built its brand around consumer-accessible less-lethal launchers, positioning the SD as a permit-free alternative to a concealed handgun for civilian self-defense.