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

1720 Cap And Ball Revolver
1720 Cap And Ball Revolver

Caring For & Feeding Your Cap-and-Ball Revolvers

Compared to pistoleros of the 19th century, today’s handgunners have it easy. It's not enough just to get an old-school, cap-and-ball revolver. You also need to acquire everything to shoot and clean it.

Lighter & Better: Savage’s Updated Ultralite Series of Rifles

Savage Arms kicked off 2026 by announcing a new generation of Model 110 bolt-action rifles, and now, the company has also introduced an updated series of Ultralite rifles.

Gun of the Week: Franchi Momentum Elite MULE

One of the latest entrants into the general-utility rifle market is Franchi with its Momentum Utility Lite Elite bolt-action rifle, also known as the MULE.

The Armed Citizen® Sept. 11, 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.

Have .22 LR Handguns Finally Become Viable Options for Self-Defense?

Although .22 LR pistols and revolvers are plentiful and affordable, they still have notable limitations when it comes to self-defense applications. 

Aero Precision Returns with New Owners

An investment group comprised of family members passionate about firearms and the outdoor sports has purchased Aero Precision, Ballistic Advantage, Stag Arms and VG6.

Interests



Get the best of American Rifleman delivered to your inbox.