Samson OFS Rail 2.2 and OFS Rail 1.5 Samson OFS Rails Samson OFS Rail 1.5. 2 and OFS rail 1.5 fit on a picatinny rail and has two different lengths to choose from and will work on any rifle with a picatinny rail. The 1.5 length will fit on a sniper Rifle Scope that has a longer eye relief and the 2.2 length will work for putting a red dot/laser sight in place over a longer sight distance. These Samson bases feature the Insight rail system. One single rail system that will work for both rifles and shotguns with different lengths of throw lengths. This eliminates the over sizing of some picatinny rails. Made from high quality aluminum with a Mil-Spec hard coat anodized finish. Specifications for Samson OFS Rail 2.2 and OFS Rail 1.5: Manufacturer: Samson Color: Black Finish: Mil-Spec Hard Coat Anodized Gun Rail: Picatinny Samson 04-06016-01: OFS Rail 2.2 and OFS Rail 1.5 OFS Rails OFS Rail 1.5