Product Details
Details
PSA 20″ CHF RIFLE LENGTH 5.56 NATO 1:7 PREMIUM RIFLE KIT
- Barrel Length: 20″
- Gas System: Rifle Length
- Barrel Profile: A2
- Barrel Steel: “Machine Gun Steel” barrel
- Barrel Finish: Phosphate
- Chrome Lining: Extra – thick chrome lined including chamber
- Muzzle Thread: 1/2-28
- Chamber: 5.56 NATO
- Twist Rate: 1 in 7″
- Barrel Extension: M4
- Diameter at Gas Block: .750″
- Gas Block Type: F-marked Front Sight Base
- Muzzle Device: A2 Style
- Receiver Material: Forged 7075 T6
- Receiver Type: M4
- Handguard Type: PSA Classic Handguards
- Bolt Carrier Group Included: Yes
- Bolt Steel: 158 Carpenter
- Bolt Carrier Profile: Full Auto
- Charging Handle Included: Yes
- Build Kit: PSA A2 Classic Lower Build Kit, Black
- Overall Length: 28″
- Weight as Configured: 3.6 lbs
Features
Barrel: A proprietary blend of Hammer forged chrome molly vanadium made by FN that is referred to as “Machine Gun Steel” by virtue of its required use in FN’s M249 and M240 weapons. The hammer forging process work hardens the steel, making it more durable. In addition, the chrome process for the bore allows for a lining almost twice as thick as a standard M16 for enhanced durability. Chambered in 5.56 NATO, with a 1:7 twist rate, M4 barrel extension, and a rifle length gas system. The A2 profile barrel is Mil-spec phosphate coated, High Pressure tested and Magnetic Particle inspected. Barrel is finished off with an F-marked front sight post with sling swivel, standard handguards, and an A2 flash hider.
Upper: Forged 7075-T6 A3 AR upper is hard coat anodized black for durability. Featuring T-marks, these upper upper receivers are made for us right here in the USA.
BCG: Bolt is made of Mil-s\Spec shot-peened Carpenter 158 steel. Gas key is secured with grade 8 fasteners and staked per mil-spec.
Build Kit: PSA A2 Classic Lower Build Kit
What’s Included
Customers are responsible for ensuring that when assembling kits, they must adhere to all Local, State, and Federal laws.
Your new Palmetto State Armory kit will include the listed components that are required to assemble into a complete AR rifle or pistol:
Fire Control Group
- AR-15 Hammer
- Hammer Spring
- AR-15 Trigger
- Trigger Spring
- Trigger/Hammer Pins
- Disconnector
- Disconnector Spring
Buffer Tube Assembly
- Buffer Tube
- Buffer
- Buffer Spring
- Castle Nut
- Latch Plate
- Buffer Retainer Detent
- Buffer Retainer Detent Spring
Takedown & Pivot Pin Assembly
- Takedown Pin
- Pivot Pin
- Takedown Springs (3)
- Takedown Detents (3)
Bolt Catch Assembly
- Bolt Catch
- Bolt Catch Detent
- Bolt Catch Detent Spring
- Bolt Catch Roll Pin
*Not included in 9mm build kits.
Magazine Catch Assembly
- Magazine Catch
- Magazine Catch Button
- Magazine Catch Spring
Safety Selector Assembly
- Safety Selector
- Selector Detent
- Selector Spring
Reviews


Shipping and Delivery
Timely Order Processing
To ensure a smooth shopping experience, we begin processing your order as soon as it’s placed. Typically, this takes 1-2 business days. Once your package is on its way, you’ll receive a tracking number, allowing you to follow its journey.
Flexible Shipping Options
For your convenience, we offer both standard and expedited shipping. If you choose standard shipping, your order will arrive in 3-4 business days. On the other hand, if you need your items sooner, expedited options are available so inform us at checkout. Regardless of your selection, we strive to deliver your purchase as quickly and efficiently as possible.
Global Delivery Services
For our international customers, we proudly ship worldwide. However, delivery times may vary depending on your location. While most international orders arrive promptly, certain destinations may require additional time due to customs processing.
Clear Costs and Support
To avoid surprises, all applicable shipping fees are calculated at checkout. Additionally, if you have questions or concerns about your order, our support team is ready to help. Whether you need assistance with tracking, delivery updates, or shipping details, we’re here to ensure your satisfaction every step of the way.