The o rings provide special inner barrel stabilization

32G Our proprietary ingredients enhance the biodegradation of HighPowerAirsoft™ Enhanced Biodegradable BB in a biologically active landfill (appropriate facilities not available in all areas)

They come in a variety of colors and are perfect for adding extra color to your build

Please make sure your Airsoft gun is compatible with green gas before purchasing

NcStar Picatinny Riser .625 Short Angel Customs The o rings provide specialShort 1913 Picatinny Rail 0. 625H riser X 2. 2"L. Allows the user to raise their optic 0. 625 above their receiver height Picatinny rail for the desired optic height. Great for a better heads up shooting with night vision equipment. Height: 0. 625" Length: 2. 2" Weight: 1. 9 oz.