PSA 16″ M4 5.56 NATO 1/7 Phosphate MOE EPT Rifle Kit w/ Rear MBUS – 5165502313
$388
Product Details
Details
Barrel Length: 16″
Gas System: Carbine-Length
Barrel Profile: M4
Barrel Steel: 4150V Chrome Moly
Barrel Finish: Phosphate
Chrome Lining: none
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 Flash Hider
Receiver Material: Forged 7075 T6
Receiver Type: M4
Handguard Type: Magpul MOE Black Handguards
Bolt Carrier Group Included: Yes
Bolt Steel: Carpenter 158
Bolt Carrier Profile: Full Auto
Charging Handle Included: Yes
Rear Sight: Magpul MBUS Rear Flip-Up Sight
Overall Length: 24.5″
Features
Barrel: Phosphate finished 4150V chrome moly vanadium 16″ barrel. Chambered in 5.56 NATO, with a 1:7 twist, M4 barrel extension, and a carbine-length gas system. this M4 barrel is is finished off with Magpul MOE carbine-length handguards, F-Marked gas sight base, and A2 flash hider.
Upper: Forged 7075-T6 A3 AR upper is made to MIL-SPECS and hard coat anodized for durability. These uppers are made for us right here in the USA by a mil-spec manufacturer.
Bolt: Full-auto profile bolt carrier group. Milspec Carpenter No. 158® steel bolt, Shot Peened, High pressure tested, Mag particle inspected, Gas Key Hardened to USGI Specifications, Fastened with Grade 8 screws, and Staked Per Mil-Spec. 8620 steel M-16 profile carrier is chrome lined and phosphate coated.
Build Kit: PSA EPT MOE Lower Build Kit
Includes Magpul MOE Stock, Pistol grip, and trigger guard, Palmetto State Armory EPT Lower Parts Kit and Mil-Spec diameter 6-position buffer tube assembly.
EPT Lower parts kit upgrades the standard combat-style fire control group with a single-stage, target-style, fire control group with polished contact surfaces and a electroless nickel coating.
Everything you need to finish your stripped lower!
Includes: Magpul® MBUS Rear Sight, Black
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


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.