Secure Arms Guns & Ammos
S5-PVAR
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S5-PVAR
The S5-PVAR and F5-PVAR are both caliber 5.56 NATO rifles manufactured by United Defense Manufacturing Corp. (UDMC). The “S” in S5-PVAR denotes a Semi-Automatic rifle for civilian and commercial use, while the “F” in F5-PVAR signifies a Full-Automatic rifle designed for military and law enforcement. Both use UDMC’s patented PVAR (Pneumatic Valve and Rod) operating system for gas operation, which offers advantages like reduced cleaning requirements and increased reliability compared to direct gas impingement systems.
Key Differences:
- S5-PVAR: Semi-automatic operation.
- F5-PVAR: Full-automatic operation.
Similarities:
- Manufacturer: Both are made by United Defense Manufacturing Corp.
- Operating System: Both utilize the PVAR system for their gas-operated function.
- Caliber: Both are chambered in the 5.56 NATO round.
- Design: Both are based on the designs of the M16 and M4 rifles.
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