Wilson Combat AR15/M16 Flat-Wire 37 Coil Buffer Spring Silver. Its 37-coil design offers superior linear compression reducing stacking and increasing reliability. Whether you're taking on a competition or just want to enjoy some recreational shooting this spring makes sure that your performance is as consistent as possible. Not only is it made from a durable chrome silicon material but its flat wire design increases tensile and compression strength. As a result you can expect the spring to last longer than conventional springs. With its superior design and construction this Wilson Combat buffer tube spring is an essential upgrade for your AR-15. Get ready to take your rifle's performance to the next level 37 coil flat wire chrome silicon AR-15 buffer tube spring Superior linear compression with less stacking and increased reliability Durable chrome silicon material increases tensile and compression strength Lasts longer than conventional springs Essential upgrade for your AR-15 rifle's performance Specifications for Wilson Combat AR15/M16 Flat-Wire 37 Coil Buffer Spring: Manufacturer: Wilson Combat Color: Silver Features of Wilson Combat AR15/M16 Flat-Wire 37 Coil Buffer Spring The Wilson Combat flat wire chrome silicon 5.56 NATO AR-15 buffer tube spring is designed to give your rifle the edge it needs. Its 37-coil design offers superior linear compression reducing stacking and increasing reliability. Package Contents: Wilson Combat AR15/M16 Flat-Wire 37 Coil Buffer Spring Wilson Combat TR-FWBS37: AR15/M16 Flat-Wire 37 Coil Buffer Spring Silver