OPS-420 for 20″ guns

We are proud to present the most revolutionary product to hit the firearms market in years. If you own an AR15 , M16, or M4 style rifle in either full or semi auto, then you have everything you need to use the Osprey Defense OPS-420 Gas Piston Conversion System on your rifle.

Part # OPS-420

The OPS-420 Gas Piston System fits most standard AR15/M16 full length rifles with a 20″ barrel outer diameter equal to, or less than .875″ . This covers more than 95% of all AR15/M16/M4 rifles ever made. There are some exceptions to this and we will note them under the “fit chart” area as they come in. Most likely, if you have an unmodified gun from a quality name brand, the OPS-420 will fit just fine.

MSRP= $349

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