Shooting a modified version of the powerful and classic straight-walled cartridge, Phoenix Weaponry’s 45-70 Auto Christine rifle can tangle with nearly any game on earth.
How did Phoenix Weaponry take the .45-70 Government and make it the semi-auto-compatible 45-70 Auto?
- Phoenix rebated the .45-70 Government’s rim to make it function in the rifle.
- The modification allowed the use of standard .308 AR-10 parts.
- The rifle boasts a Douglas barrel with a 1:14 twist rate, perfect for heavier bullets.
- The 45-70 Auto Christine has Phoenix’s custom trigger, set to 3 pounds.
- Cost is prohibitive for many shooters, with a price of $4,800.
The .45-70 Government conjures up thoughts of a bygone era of boundless buffalo herds and the equally limitless American frontier. And, against odds, the powerful straight-walled cartridge continues to elude becoming a footnote in history books as some novel relic of yesteryear. It is still alive and well today, a favorite of shooters who prefer slower, heavier rounds that can handle nearly anything that treads upon hoof, paw or foot.

There are plenty of modern-day rifles chambered for the .45-70, from classically inspired single shots to the most up-to-date lever actions. But if Phoenix Weaponry has its way, shooters will look at the more than century-old cartridge in an entirely different light from here on out. That’s because the Colorado-based AR manufacturer has its sights set on reinventing the large-bore round as fodder for a semi-automatic rifle.
In one of the more unique moves in the AR market in recent years, Phoenix Weaponry has introduced an AR-10-style rifle chambered for the classic round (or at least a version of it) — the 45-70 Auto. Also lovingly known as Christine, the rifle represents perhaps one of the greatest leaps for the cartridge since it transitioned to smokeless powder. Although, getting the good old Government up to speed for a modern rifle platform did take some doing — not to mention a smidgen of ingenuity.
The obvious hurdle to cross was the .45-70’s rimmed case. While not impossible, it would take some intensive re-engineering to modify an existing semi-automatic to reliably chew through this style of cartridge — from bolt to magazine and what have you. Phoenix opted for the easier option, and instead of tinkering the rifle around the cartridge, it re-designed the brass to the gun.
What they came up with is elegant in its simplicity. The company merely rebated the rim, essentially making the cartridge rimless, thus highly compatible with the AR-10 platform. The results were right on the money, with the modified .45-70 cartridge so in tune to the rifle Phoenix was able to utilize it’s everyday .308 Win. bolt head, carrier and receivers.

And the company didn’t have to sacrifice any of the cartridge’s performance shoehorning it into an AR-10. Phoenix claims the rebated case is reloadable with existing .45-70 data — based on Ruger No. 1 loads — and standard dies. The only thing that changes in the process is the shell holder. One compatible with a .308 is required.
Ammo, as expected in a specialty set up such as the .45-70 Auto, is a concern. Your local shooting supplies store isn’t going to be brimming with .45-70 with rebated rims anytime soon. Phoenix foresaw this issue and includes 50 introductory cases with a new rifle and the option to buy more factory-modified brass straight from the company. But Phoenix hasn’t turned its back on dyed-in-the-wool D.I.Y. folks — at least ones with lathes. Cutters are available from the company. So motivated shooters with access to a machine shop can turn off-the-shelf .45-70 Government brass on their own.
The 45-70 Auto itself appears stoutly built, constructed around Phoenix’s RFL upper and lower receivers, originally designed for the company’s .308 builds. The company turned to Douglas Barrels out of West Virginia for the chrome-moly number on the 45-70 Auto. It is attached with custom bushings, is 18 inches in length and is a custom profile — very much bull. The barrel is button rifled with a 1:14 twist, which is quite fast for the caliber and opens heavier bullet options to shooters. The barrel is topped off with Phoenix’s Chevron muzzle brake, designed to keep the line of sight free and clear shot to shot.
Christine utilizes a rifle-length gas system with a low-profile adjustable gas block. It is outfitted with Phoenix’s 15-inch, free-floating modular aluminum handguard that features in-house manufactured Picatinny rail sections for the quick addition of QD sling mounts, and what have you. And it boasts the company’s custom trigger, tuned to a crisp 3 pounds.
Finally, the 45-70 has a Magpul adjustable ACS stock and MOE pistol grip. And the nearly 10-pound rifle is Cerakoted in Flat Dark Earth and comes with a 10-round Magpul magazine, modified to hold six rounds.

There is a rub to getting a 45-70 Auto in a gun safe, however — price. An AR unique as this doesn’t come cheap; Phoenix has a hefty $4,800 basement on the behemoth and will customize as far as a shooter’s wallet can handle. It’s definitely not an ‘Everyman’s’ rifle, nor does it appear Phoenix intended it to be.
Like all special ladies, Christine is one of a kind. She’ll most likely attract shooters as unique as her. And they could be well served with the investment. Up to and including dangerous game, there’s little on God’s green earth she can’t handle.

The mantra of “keep your booger hooker off the bang switch” turned out not to be enough. I’ve seen cops who kept their belt-mounted key ring in front of the holster where, with movement or even previous strenuous activity, a key could wind up on the edge of the holster in line with the incoming trigger during holstering. There was one famous case of an old, soft leather holster bending enough that when a man inserted his Glock into it, the fold of leather hit the center of the trigger and the pistol discharged.
Full time police work only 40 hours a week not counting overtime, and there are 168 hours in a week, so every cop is off duty more than he or she is on. (As a part time cop for 43 years, I was off duty even more.) Off duty cops, or plainclothes officers, or armed citizens when they’ve had to pull a gun on the street against criminals, will be unidentifiable as Good Guys and Gals when the uniformed cops pull up. Those cops have been told “Person with a gun, there now.” The Good Guy or Gal is “Person with a gun, there now”! It behooves them to get that gun put out of sight quickly and smoothly, without taking their eyes off the person present who was so dangerous they had to pull a gun on him in the first place.
I had a chance to shoot the new Colt Night Cobra at the 2018 Industry Day at the Range a day before SHOT Show, and I came away mostly impressed, which makes sense seeing as I found 






In the 1967 edition of the Gun Digest Annual, the late Roger Barlow wrote a review of the new Ruger rifle and eloquently described the appeal of the single shot.



























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