Description
The UXR Elite is built around a single premise: one serialized receiver that you convert between calibers rather than buying a separate rifle for each role. Primary Weapons Systems calls the mechanism the XCHANGE system, and it reduces a caliber swap to three components — barrel, bolt head, and magazine well — so a shooter can move between cartridges without sending the rifle anywhere or touching a serialized part. That modularity matters most to shooters who want a single platform to handle different ammunition types across seasons or disciplines without managing multiple lower receivers.
The gas system is a modified long-stroke piston design. Long-stroke operation keeps the carrier moving through the entire power stroke before the bolt unlocks, which smooths the impulse curve compared to short-stroke designs and tends to stay cleaner under sustained use because hot propellant gas never enters the upper receiver. PWS incorporates a bore-evacuation chamber in the barrel itself, which works with the piston system to further reduce felt recoil and keep combustion byproducts moving forward rather than back toward the shooter.
The .223 Wylde chamber is a deliberate middle point: its dimensions accept both .223 Remington and 5.56x45mm NATO ammunition while maintaining the tighter leade of a .223 chamber, which preserves accuracy that a straight mil-spec 5.56 chamber can sacrifice. The handguard is M-LOK free-float, meaning it attaches only at the receiver and leaves the barrel entirely unsupported by the furniture — removing any point of contact that could disturb harmonics as the barrel heats. An FRC compensator is fitted at the muzzle. The stock is folding and adjustable. This rifle suits a shooter who wants a precision-capable semi-automatic platform with genuine multi-caliber flexibility rather than a fixed-configuration carbine.






