Designed to fit most AR/M4 T-6 position adjustable stocks, installs with no stock modification required. * Comes with a Sorbothane insert and slips over the hard plastic buttplate of most AR/M4 T-6 type stocks. * Adds approximately 1/2" to your length-of-pull. * Help maximize your shooting comfort, improve shooting results and radically decrease felt recoil * One size fits most AR-M4 T-6 Adjustable Stocks.