Flint River Armory CSA45 Carbine

    Flint River Armory is a firearms manufacturer located in Huntsville, Alabama. They’ve released their first product – CSA45 (Carbine Semi-Automatic) carbine. It is designed from ground up to be a dedicated pistol caliber carbine chambered in .45ACP. It is a gas operated gun with a short stroke gas piston.

    Flint River Armory - 1

    CSA45 features machined receivers from billet 6061 T6 aluminum. It comes either as a rifle with 16″ barrel or as an SBR with 10″ one, and both barrels have threaded muzzles. The forearm of the gun is available with KeyMod or M-Lok accessory attachment options. The lower receiver is monolithic with the buffer compartment, which is meant to make it a stronger design. The gun also has a telescoping buttstock made of glass filled Nylon. CSA45’s upper receiver houses a reciprocating side charging handle on its left side.

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    Another interesting feature of this carbine is that it uses standard AR-15 lower receiver parts. So the controls should be familiar to most of the customers. It will also allow the users to upgrade the carbine with one of countless aftermarket AR-15 triggers, as well as easily and cheaply replace broken trigger control group parts. CSA45 uses a proprietary stainless steel 25 round magazines. The gun also features a four lug rotating bolt.


    Currently, CSA45 is chambered only in .45ACP, but Flint River Armory plans to offer the gun also in 9mm, .40S&W, 10mm Auto and .460 Rowland. The carbine works with wide variety of .45ACP cartridges. Here is a chart showing how it performs with ammunition from different manufacturers and with different loads/bullet weights:

    CSA45 - chart

    The dimensions and weight of the gun are as follows:

    (Standard) 16” barrel: 30.9”
    (SBR) 10” barrel: 24.9”

    (Standard) 16” barrel: 6.56 lbs (empty, no optic)
    (SBR) 10” barrel: 6.0 lbs (empty, no optic)

    CSA45 is available through the manufacturer’s website at MSRP of $1695.

    Here is a video from their YouTube channel as well as one from GunBlast.com :



    Website: www.FlintRiverArmory.com
    Address: 706 Rison Ave, Huntsville, AL 35801
    Phone: 855-45-DFENS (855-453-3367)
    E-mail: [email protected]

    Hrachya H

    Managing Editor

    Being a lifelong firearms enthusiast, Hrachya always enjoys studying the history and design of guns and ammunition. He also writes for OvertDefense.com and SilahReport.com
    Should you need to contact him, feel free to shoot him a message at [email protected]