PS-420 gas piston conversion kit fits almost all full auto versions of the AR15, M16 or M4 rifle.
Assuming a barrel diameter of less than .875 inches, the OPS 420 will fit. This covers most of all AR15, M16 or M4 rifles ever made.
Almost certainly, if you have a stock rifle from a quality manufacturer, the OPS-420 will fit just fine.
If you are looking for a way to make your rifle more controllable and reliable under adverse conditions, the OPS 420 is a great addition to your current system.
The Osprey Defense OPS-420 is certified to fit any Magpul MOE Handguards with slight modification to upper heat shield.
Vincent Ostera is a Texas Gun Dealer that specializes in tactical supply including the Osprey Defense OPS-420
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Osprey Defense OPS-420 Review
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