Bushmaster ACR Caliber Conversion System Comes to Market

by
posted on October 11, 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. **
finalacr-beauty-shot-1.jpg

After eight years of anticipation, the Bushmaster Unicorn, also known as the ACR caliber conversion, has finally hit the market. This caliber conversion system for the ACR, a platform that offers fully ambidextrous controls, improved ergonomics, an ultra reliable gas -piston operating system, and tool-less configuration and caliber adaptability, is promised to be the first of many caliber options. For now however, these conversions will be offered in .450 Bushmaster, and 6.8 Rem. SPC II. For a complete list of the options now available, please see the chart below:

Product Specifications

Product

Order #

Barrel

Magazine Capacity

2018 MSRP

16” .450 Bushmaster ACR Conversion

90023

16” FNC Treated 4150 CMV, 1:24”
twist

5 Round Polymer

$699

18.5” .450 Bushmaster ACR Conversion

90024

18.5” FNC Treated 4150 CMV, 1:24” twist

5 Round Polymer

$699

16” 6.8 Rem. SPC II ACR Conversion

90028

16” FNC Treated 4150 CMV, 1:11” twist

25 Round

$699

 

Latest

Magpul/ZEV FDP Carbine
Magpul/ZEV FDP Carbine

Ori-gun-i: The ZEV Technologies FDP Carbine

The American art of folding polymer and steel into a working firearm reaches what might be its zenith with the Zev Technologies/Magpul FDP.

Study Finds Correlation Between Firearm Training & Safe Gun Storage

In a survey of more than 1,000 firearm owners across the nation, researchers found that firearm training increases responsible gun storage at a dramatic rate.

The Armed Citizen® Oct. 12, 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.

Review: Glenfield Firearms Model A

The Glenfield Firearms Model A is a stalwart budget option returning to the market under the Ruger umbrella.

Skills Check: Taking Time Off

Our drill this month is a real worker bee. It trains you to deliver a well-placed transition round and deliberately decreases the time it takes you to move the muzzle and set up for the next one.

Range Review: Canik Prime Radian

With the new Canik Prime Radian, you can have your compensator and your flared magazine well, too, all inside an easily carried, compact handgun.

Interests



Get the best of American Rifleman delivered to your inbox.