PSA 14.7" CHF 5.56 PINNED & WELDED

Published on March 25, 2021
Duration: 10:05

This review covers the Palmetto State Armory 14.7" CHF 5.56 upper assembly featuring a pinned and welded A2 flash hider to achieve a 16" legal barrel length. The FN-made cold hammer-forged barrel is highlighted for its durability and accuracy, with a mid-length gas system noted for excellent recoil impulse and reliability with various ammunition types. The PSA-branded M-LOK rail system offers modularity and QD sling points.

Quick Summary

The Palmetto State Armory 14.7" CHF 5.56 upper receiver achieves legal 16-inch barrel length via a pinned and welded A2 flash hider. It features a durable FN cold hammer-forged barrel made from chromoly vanadium steel, known for its use in military machine guns. The mid-length gas system ensures smooth operation and reliability with various ammunition types.

Chapters

  1. 00:54Introduction to PSA 14.7" Upper
  2. 01:14Premium Cold Hammer Forged Barrel by FN
  3. 01:40Pricing and Availability Discussion
  4. 02:01PSA Premium Uppers and Value
  5. 02:14Rail and Gas Block Comparison
  6. 02:36PSA Upper Durability (Torture Test)
  7. 02:59A2 Bird Cage Flash Hider (Pinned & Welded)
  8. 03:36Why Choose a Pinned & Welded 14.7" Upper?
  9. 04:20FN Cold Hammer Forged Barrel Specs
  10. 05:09Steel Gas Block and Mid-Length Gas System
  11. 05:34Cycling Performance with Various Ammunition
  12. 05:50Suppressor Compatibility
  13. 06:24M-LOK Rail System Features
  14. 07:12Upper Receiver and BCG/Charging Handle
  15. 07:54Overall Reliability and Performance Summary
  16. 08:08Buffer and Spring Recommendations
  17. 08:40Accuracy and Shooting Impressions
  18. 09:29Ammo Donation Shout Out (American Pawn and Gun)

Frequently Asked Questions

What makes the PSA 14.7" CHF 5.56 upper receiver legally compliant as a rifle?

The PSA 14.7" upper is legally compliant for rifle lowers because it features a 14.7-inch barrel with an A2 Bird Cage flash hider permanently pinned and welded. This modification brings the total barrel length to 16 inches, meeting federal legal requirements without requiring NFA registration as a Short-Barreled Rifle (SBR).

What are the key benefits of the FN cold hammer-forged barrel used in this PSA upper?

The FN cold hammer-forged barrel offers superior durability and accuracy. Made from chromoly vanadium steel, it's high-pressure tested and MPI inspected, similar to barrels used on military machine guns like the FN M249 and M240, ensuring longevity and consistent performance.

Why is a mid-length gas system preferred for this PSA 14.7" upper?

A mid-length gas system on this upper provides an excellent recoil impulse, making the rifle smoother to shoot. It's also tuned to reliably cycle high-pressure 5.56 ammunition and even steel-cased rounds without over-gassing, contributing to overall reliability and shooter comfort.

What buffer and spring setup is recommended for the PSA 14.7" CHF upper?

For optimal performance with this PSA upper, standard carbine buffer springs and buffers are recommended. Heavy buffers like H2 or H3, or .308 springs, are generally not needed and can potentially cause cycling issues with weaker ammunition due to the efficient mid-length gas system.

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