US Guide Lamp M3 "Grease Gun" .45 ACP Machine Gun & Integral JCB .45 Silencer

US Guide Lamp M3 "Grease Gun" .45 ACP Machine Gun & Integral JCB .45 Silencer

The M3 submachine gun, affectionately nicknamed the “Grease Gun” due to its resemblance to the mechanic’s tool, was developed during World War II as a low-cost alternative to the Thompson submachine gun. While the Thompson was effective, it was expensive and time-consuming to produce. The U.S. Army needed a simpler, more economical solution—and that’s where the M3 came in.

Step into the legacy of American firepower with the US Guide Lamp M3 “Grease Gun”—a fully transferable, C&R-classified machine gun that embodies WWII-era innovation and rugged simplicity. Chambered in .45 ACP and paired with a JCB integral suppressor, this rare piece of military history offers collectors and enthusiasts a unique blend of historical authenticity and tactical enhancement.

Originally designed for close-quarters combat, the M3’s compact profile, 9" barrel, and iconic stamped steel construction made it a favorite among tank crews and paratroopers. This particular model is enhanced with a JCB suppressor featuring baffles and a plastic wipe, delivering effective sound suppression in a sleek, integral design. With its patina finish and BATFE registration as a Class 3 NFA item, this Grease Gun is not just a firearm—it’s a living relic, ready for legal ownership and display.

Historic WWII-Era Design
Originally fielded in 1944, the M3 is a symbol of American ingenuity and battlefield reliability.

Integral JCB Suppressor
Features baffles and a plastic wipe for effective sound reduction in a streamlined, fixed design.

.45 ACP Chambering
Delivers hard-hitting stopping power with subsonic compatibility for suppressed shooting.

Vintage Finish
Black/patina exterior adds character and authenticity to this collectible piece.

Iconic Simplicity
Straight blowback operation and minimalist controls make it easy to operate and maintain.

Fully Transferable Class 3
Legally registered and transferable under NFA regulations—ideal for serious collectors and Class 3 license holders.

C&R Classification
Recognized as a “Curios or Relic” under 27 CFR 478.11, preserving its historical significance.

Specifications

• Firearm Manufacturer: Guide Lamp
• Model: M3 “Grease Gun”
• Caliber: .45 ACP
• Barrel Length: 9"
• Finish: Black/Patina
• Suppressor Manufacturer: JCB
• Suppressor Model: Integral Design
• Suppressor Caliber: .45 ACP
• Suppressor Length: 14.5" Overall
• Suppressor Features: Baffles plus plastic wipe
• Operation: Straight blowback
• Transferable: Yes (Class 3 NFA)
• C&R Status: Yes
• Registration: BATFE Class 3 NFA item