NRA Gun of the Week: Standard Mfg. S333 Thunderstruck

by
posted on October 30, 2020
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
Standard Mfg. has brought innovative and defense-oriented firearms to market that diverge from its sister company’s well-beaten path. The S333 Thunderstruck revolver is another example of unique design from the Connecticut-based manufacturer. The S333 is a twin-barreled revolver with capacity for eight rounds of .22 WMR and has an overall weight of 18 ozs.

Double barrel muzzle view revolver

The S333 revolver is designed to provided maximum and controllable firepower in a fairly compact package—the gun utilizes two barrels of which a cylinder presents a cartridge for each. Users are required two fingers for the double-action-only trigger press that ignites two magnum rimfire cartridges. Standard Mfg. provides a passive transfer bar safety mechanism to prevent unintentional discharge.

black revolver trigger and grip white background

A cylinder release is found on the left side of the frame and the cylinder was noted to swing out freely. Topping the eight-shot revolver are a set of aiming reference marks. Our testers found the gun’s grooved polymer stock and frame design to point instinctively on target and recoil was noted to be minimal. Company literature states the barrels are regulated for 40-grain loads from CCI and PMC and that variations in other ammunition can cause problems with accuracy.

black revolver in hand

Watch our NRA Gun of the Week video above to learn more about the Standard Manufacturing S333 Thunderstruck revolver.

Standard Manufacturing S333 Thunderstruck Specifications
Manufacturer: Standard Mfg. Co. LLC.
Action Type: double-action, double-barrel rimfire revolver
Chambering: .22 WMR
Barrels: 1.25” steel
Frame: 7075 aluminum, anodized finish
Sights: fixed, three-red dot, square-note rear, post front
Weight: 18 oz.
MSRP: $429

Further Reading:
Standard Manufacturing STD-15 Model A

Tested: Standard Mfg. 1911 Case Colored #1 Engraved Pistol

Bill Ruger's .22 Pistol

Identifying Mauser Markings

Extras:






Latest

Benelli M4 EXT shotgun
Benelli M4 EXT shotgun

Gun of the Week: Benelli M4 EXT Tactical Shotgun

Benelli's semi-automatic workhorse shotgun continues to evolve and improve.

The Armed Citizen® Feb. 6, 2026

Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.

New for 2026: Tool Collections from Real Avid

Real Avid just released some new tool collections to help with cleaning, optics mounting and other firearm-related chores.

Review: Bersa M2XI Pistol

The M2XI represents a new area for Argentinian firearm manufacturer Bersa, and this budget 2011 shoots above its price point.

Great American Outdoor Show Opens Feb. 7

America's largest gathering of outdoor enthusiasts opens Feb. 7 and runs through Feb. 15.

New for 2026: CCI Blazer Brass Clean-Fire Ammunition

With the huge boom in suppressor sales, CCI has ammo designed for suppressed firearms.

Interests



Get the best of American Rifleman delivered to your inbox.