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

Staccato HD P4.5
Staccato HD P4.5

Review: Staccato HD P4.5

Combining an exclusive pistol design with a ubiquitous magazine makes the Staccato HD P4.5 practical and desirable.

Skills Check: Rifle Standard Gold

Here’s how to improve your close-range carbine handling.

Caracal USA Awarded Government Contract in the Bahamas for CMP9K

Caracal USA announced it would be supplying its CMP9K platform to various government agencies in the Bahamas.

The Short Life of America’s Anti-Tank Rifles

At the dawn of mechanized warfare, the U.S. Military contended with the reality that infantrymen would need an effective arm to defeat tanks. Their idea? Bring more gun.

Springfield Armory's XD Mod.4 OSP: Anything But Basic

For nearly 25 years, Springfield Armory has offered its affordable and reliable XD series of handguns, and for 2026, that design has now entered its fourth generation with the Mod.4 OSP.

The Armed Citizen® March 23, 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.

Interests



Get the best of American Rifleman delivered to your inbox.