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  4. Not Your Grandpa's .45: Review Springfield Armory TRP 1911 with Aimpoint COA Red Dot

When Springfield announced earlier this year it was adding one of the best enclosed emitter red dots to its vaunted TRP line of 1911s, we knew we had to get it to the range. 

Quick Summary: Over the past 25 years, Springfield has gotten the TRP series dialed, and the new Aimpoint COA red dot seems custom-made for the platform. We found lots to love and very little to dislike with this combo, detailed below.  

Table of Contents

Overview
The Specs
Features
Sights/Optic
Trigger
Reliability
Accuracy
Pros & Cons
Conclusion
 

Overview


Springfield offers a broad range of 1911 models, all built with forged, not cast, major components. The lineup starts with the entry-level Mil-Spec, Garrison, and Ronin series, moves through the Operator, Emissary, and Loaded lines, topping out with the Tactical Response Pistol, or TRP, long regarded as the company’s premium single-action handgun. 

What makes the TRP so good?

In the 1990s, the FBI sought a pistol for its elite Hostage Rescue Team and regional SWAT units. Springfield won the 1998 contract for 500 M1911s built to exacting standards through careful hand-fitting in the SA Custom Shop. Soon after, the Marines ordered 150 similar pistols for evaluation with its MEU(SOC) units. The HRT contract pistol evolved into the Professional Model and, later, the TRP, which has well earned its legendary status over the past two decades.

Standard features on today's TRPs – going beyond the careful selection and fitment of components – include front strap checkering at 20 lines per inch, forward slide serrations, sighting plane serrations, the company's Gen 2 Speed Trigger, a skeletonized hammer, premium sights, a straight mainspring housing, and G10 grips.

New for 2026 are TRP models equipped with Aimpoint's popular and recently introduced small-form COA series enclosed red dot, factory installed. For now, the only option in the TRP series with this optic is a Government-length (5-inch) railgun in black, chambered for .45ACP.
 

Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
We are featuring an all-black TRP A-Cut in .45ACP in this review, Aimpoint COA optic included from the factory. (Photos unless noted: Chris Eger/Guns.com)

For full disclosure, Springfield sent Guns.com this handgun for review purposes. All testing was done on this one pistol, which has been under evaluation since May.
 

Specs

Caliber .45 ACP
Weight 39.2 ounces (with empty magazine and optic)
Barrel Length 5 inches
Overall Length 8.6 inches
Capacity 8+1 (two steel mags included)
Trigger pull 4.5 pounds (10-pull average)
Optic Cut A-Cut
Frame Forged steel with M1913 Rail
Finish

Black Cerakote

 

Features
 

Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
The Government-length TRP COA runs a 5-inch barrel that gives it an overall length of 8.6 inches. 
Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
Weight, with a steel frame and its companion Aimpoint COA installed, is 39.2 ounces unloaded. The slide and frame are forged carbon steel, while the barrel is forged stainless steel. 
Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
The top of the slide has finely cut sighting plane serrations that help cut down glare by diffusing light. Note the lowered and flared ejection port, which helps with reliability. 
Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
The TRP has a rock-solid feel to it and a tight lockup. There is absolutely no play between the bushing and barrel. The two-piece National Match guide rod needs a tool for disassembly (5/32 Allen, included, lefty loosie, righty tightie).
Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
Other than the two-piece NM guide rod, fieldstripping is like any other 1911.
Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
The match-grade barrel has a fully supported ramp at the chamber, which improves reliability and case-head support.
Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
It is easy to see the components have been carefully selected and matched for fitting. The hand-etched numbers are a run-off of the last digit of the pistol's serial number. 
Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
Of note, the TRP is what would be described by 1911 fans as a Series 70-style pistol, meaning it doesn't have a firing pin safety block and related spongy trigger found in Series 80 designs. 
Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
The oversized forged carbon steel frame rails are a match fit to the slide. 
Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
The accessory rail runs the length of the dustcover. The Surefire X300 makes a perfect fit.
Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
Even with the rail, there are plenty of holster options out there as 1911 rail guns have been around for a minute. Our test TRP is seen here with the minimalist yet classic Galco Yaqui Slide OWB holster. 
Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
Note the forward slide serrations. The pistol has tastefully understated manufacturer’s roll marks and banners, with the slide being almost completely smooth and unmarked on the left side. 
Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
The Hydra G10 grip panels by VZ are excellent when it comes to texture, while not being too aggressive and sharp. Meanwhile, the front strap has evenly spaced 20-LPI checkering that is well done and helps maintain control.
Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
Surface controls include ambidextrous safety/slide lock levers that are well-made and easy to use. 
Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
The TRP COA comes with a two-piece magwell that is both extended and flared to ensure fast reloads.
Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
The pistol ships in a branded zipper case with two 8-round steel magazines. 


Sights/Optic
 

Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
The excellent installed sights are suppressor-height and include a black front and serrated rear. The precisely machined A-Cut slide interface allows for direct mounting of the Aimpoint COA sight. 
Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
This integrated system delivers a low-profile fit, exceptional stability, and what Springfield bills as repeatable zero retention. The COA has a crisp 3.5 MOA dot, rugged aluminum housing, and over 50,000 hours of runtime.
Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
Meanwhile, the sights co-witness in the lower third of the optic. Note that the COA is exceptionally slim as well, at 1.1 inches, scarcely wider than the 1911's  0.91-inch slide. Its roomy 15x15 mm aperture is easy to acquire. You would almost think the COA was designed specifically for the 1911. 


Trigger


The installed skeletonized Gen 2 speed trigger on our test TRP had almost no pre-travel, a crisp break at 4.5 pounds on average right out of the box, and a short reset. It is a good trigger. 

See the trigger in action on the range:
 


Reliability


The TRP is a high-performance 1911 and runs like one, without a "break-in" period so common to the breed. 

We had only one reportable mechanical issue, a failure to feed experienced at about round no. 410 on a 500-round test on the gun right out of the box, shot "raw dog," with no additional lube or preparation. By that point in the testing, the slide was starting to get sluggish.  
 

Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
The ammo used consisted mostly of Czech-made Sellier & Bellot 230-grain FMJ ball (which is bright and shiny), mixed with a few boxes of Federal (Hydra-Shok and Punch) and Speer (Gold Dot G2) 230-grain JHPs with a couple of mags worth of Hornady 185-grain XTP (eXtreme Terminal Performance) thrown in for good measure. 


Moreover, we racked the slide by the optic off a wooden barricade on our unloaded TRP to the point of physical exhaustion, twice, and never observed it to shift in point of aim/impact or feel loose. 
 

Accuracy


The Aimpoint COA has a 3.5 MOA dot and, after zeroing, we had no issue holding groups inside that aforementioned minute of angle at 15 yards. Pushing out to 25, and even 50 in offhand shooting, we had no problems keeping on target, although the group did open up a bit.  

Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
Once sighted in, it is on, for sure. 

 

Springfield TRP COA: Pros & Cons


The Pros

  • Good ergonomics
    High quality
    A-Cut allows for low, direct mount of the Aimpoint COA
    Good fixed sights co-witness with optic
    Reliable
    Accessory rail
    Decent trigger


The Cons

  • $2K entry fee. 
    Only offered currently in one color, size, and caliber. 
    Currently, only the Aimpoint COA is made to fit the A-Cut footprint. 

 

Conclusion


The TRP is a rock-solid 1911 that, by itself, is hard to beat without going full custom. When you add the Aimpoint COA to it, the optic makes this vaunted platform even better. 
 

Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
The Aimpoint COA-equipped Springfield Armory TRP could be strong medicine for home or personal defense and, being a 1911 platform, is eminently supportable. 
Springfield Armory TRP 5-inch .45 with Aimpoint COA red dot
Meanwhile, with the "bombproof" reputation and seemingly everlasting popularity of Aimpoint's optics, this pistol could well turn into an heirloom gun in 10-15 years, during which the batteries in the sight will only have to be changed 2-3 times. 


The worst we can say about it is that Springfield is only offering the gun in one color (black), one length (5-inch Government), and one caliber (.45), which is a shame, as we think the TRP/COA combo is one heck of a match. Other than that, keep in mind that the only optic made for its direct-milled A-Cut is the COA, so it kind of paints you into a corner should you not like the dot for whatever reason. However, I wouldn't get too hung up on that because, as with the Aimpoint ACRO, very soon after it was introduced, other optics makers started cranking out optics in the same footprint, so you can be sure that A-Cut footprint optics other than the COA are inbound. 

The current MSRP on the Springfield Armory TRP/COA is $2,424, which isn't outrageous when you consider a base TRP without an optics cut is $1,899, and Aimpoint sells the COA for $617. If that price still sticks in your throat, you can get a Springfield Armory Operator model with a factory-installed COA for about a third cheaper. 

Or you can just go TRP and be happy. 
 

Chris Eger

Chris Eger is an NRA-certified firearms instructor in multiple disciplines with a background in law enforcement and as a security contractor to the federal government. He has been writing badly since 2006 and has a number of poorly-received books in print.

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