Magnum Research 429 DE Mark XIX Pistol Now Shipping

by
posted on November 21, 2018
** 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. **
429de.jpg

Magnum Research, which recently announced the new 429 DE cartridge, has announced it is now shipping the Mark XIX pistol and accessories chambered in the new round.

The 429 DE pistol (DE429SRMB) features a stainless steel slide, a stainless steel frame with Picatinny bottom rail, and a 6" stainless steel barrel with integral muzzle brake and black appointments. The pistol ships with a .50AE 7-round magazine and has an MSRP of $2,143.

The 429 DE Mark XIX spare barrels with Picatinny style accessory rails are available in a variety of finishes. The barrels are 6" and are compatible with any MK19 USA or Israel Desert Eagle Pistol with a wide .830” rail on top of the barrel and uses a 50AE magazine and bolt. Barrels will be available in:

Carbon steel with Black finish, MSRP $425 (BAR4296)
Carbon steel with Burnt Bronze Cerakote, MSRP $482 (BAR4296BB)
Carbon steel with Brushed Chrome finish, MSRP $529 (BAR4296BC)
Carbon steel with Polished Chrome finish, MSRP $529 (BAR4296PC)
Stainless steel with integral muzzle brake, MSRP $482 (BAR4296SRMB)

To round out the new 429 DE product lineup, Magnum Research is offering 429 DE ammunition in 20-round boxes:

240-gr. soft point (DEP429DE240JSP) MSRP $42,
210-gr. hollow point (DEP429DE210JHP) MSRP $42

Magnum Research, Inc is the sole supplier of the 429 DE ammunition at this time.

Based on the 50 AE cartridge, the 429 DE is made with Starline brass, loaded by HSM in Montana with Sierra bullets and distributed by Magnum Research, Inc. This cartridge has a 25 percent velocity increase and 45 percent energy increase over a 44 Mag (240 -- 6" barrel). It has a velocity of 1600 fps with 240-gr. bullets and 1750 fps with 210-gr. bullets. The 429 DE features 30 degree shoulder headspaces and a neck long enough to properly hold and crimp a 240 grain bullet without set back under recoil.

Additional Reading:
A First Look at 2019's New Guns  

Latest

Steiner Predator: 4S 4-16X 44 mm
Steiner Predator: 4S 4-16X 44 mm

Review: Steiner Predator: 4S 4-16X 44 mm

The benefit of a lightweight rifle is lost the moment you top it with a clunky, overweight optic, particularly a lengthy one. To that end, we are starting to see an emphasis on riflescopes that are less cumbersome when mounted, such as Steiner’s Predator 4S.

A Carry-Ready Classic: Outfitting A Ruger Speed-Six Revolver

Already a fan of Ruger’s long-discontinued double-action Security-Six, Police Service-Six and Speed-Six revolvers, I simply couldn’t pass up the opportunity to acquire one of the latter in 9 mm Luger when an unfired, 42-year-old example turned up at a gun show.

Old Glory Bank Sponsors 2025 National Youth Shooting Sports Conference

Old Glory Bank, which provides banking services to NRA-affiliated clubs and associations, served as the presenting sponsor for the National Youth Shooting Sports Conference in October.

Shooters, Listen Up! Take Hearing Health Seriously

When it comes to the five senses, hearing is one of the most susceptible to damage from the shooting sports. Now, the latest electronic technology gives compromised ears a new lease on life—and protects them from further harm.

The Armed Citizen® Nov. 17, 2025

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

NRA Supports Hunters For The Hungry Programs

In 2025, Hunters for the Hungry programs across the United States will have extra support from the National Rifle Association, thanks to NRA Foundation donors.

Interests



Get the best of American Rifleman delivered to your inbox.