Flint River Armory CSA45 Carbine -The Firearm Blog

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.

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.

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:

The dimensions and weight of the gun are as follows:

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

Weight:
(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 :