Preview: The Shooter’s Box | .577/450 Martini-Henry Chamber Adapter

by
posted on August 21, 2022
** 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. **
.577/450 Martini-Henry Chamber Adapter

Thanks to the discovery of a cache of Martini-Henry (MH) rifles in Nepal in 2000, many of these 19th century military arms are commonly available in the U.S., but compatible .577/450 MH ammunition is far less plentiful.

The Shooter’s Box enables MH owners to fire easily obtainable .45 Colt rounds through their rifles, thanks to its U.S.-made, stainless-steel chamber adapter machined to the dimensions of a standard .577/450 cartridge. The adapter provides a clear throat that allows fired .45 Colt projectiles to enter the gun’s rifling.

Due to variances in chamber dimensions, the adapter may not work in all guns, and accuracy can be somewhat lacking, due to varying bore diameters in MH rifles. The price is $69 per adapter.

For more information, please visit theshootersbox.com.

Latest

Japanese Type 94 Ihtog 1
Japanese Type 94 Ihtog 1

I Have This Old Gun: Japanese Type 94 Pistol

Among the pantheon of World War II military sidearms, the Japanese Type 94 stands out for a number of undesirable reasons. Aside from its ungainly look, many regard it as one of the most dangerous firearms ever made.

New For 2025: GForce Arms 12Hammer

The latest option in the diverse lineup of GForce Arms shotguns is the 12Hammer, an AR-style platform chambered for 12-ga. shotshells that feeds from detachable box magazines.

Tips & Techniques: DIY Fire Bluing

Is there anything prettier than fire bluing? This bright, “peacock” blue color is one of the world’s oldest firearm finishes and can be found on guns dating back as early as the 16th century and is still used on some of today’s high-end custom arms.

Rifleman Q&A: Eddystone Bayonets

"I recently started collecting World War I U.S. military firearms. I want to obtain a Model 1917 rifle made by each contractor—Winchester, Remington and Eddystone—along with bayonets for each. However, I can only locate bayonets made by Winchester and Remington. Why are bayonets made by Eddystone so hard to find?"

NRA Youth Education Summit 2025 Provides Scholarships, Leadership Lessons

The 2025 NRA Youth Education Summit (Y.E.S.) brought together 32 exceptional high school students from across the United States.

Unfair Advantage: The Walther PDP Pro-X PMM

The latest “Pro” model in this famous German maker’s line of U.S.-assembled pistols leverages more than 100 years of experience in building service-size semi-automatics. And the results are better than even most experienced shooters should expect.

Interests



Get the best of American Rifleman delivered to your inbox.