PSA CHF M4 Upper Meltdown!
This video details a destructive 'meltdown' test on a Palmetto State Armory (PSA) CHF M4 upper receiver with an FN cold hammer forged barrel. The test involved continuous full-auto fire until failure, which occurred at 430 rounds due to a ruptured gas tube. Post-test inspection revealed the barrel remained in excellent condition, indicating its durability under extreme stress.









