Genuine DPMS factory parts will help you repair an existing rifle or correctly install a stock to a custom build. Buffers and springs are weighted to function properly in DPMS LR-308 and Remington R-25 rifles. Rifle Spring fits buffer tube for fixed, A2-type rifle stock; will not work in carbine tube.
AR-15, Issue:11, Page:041
Big Book Catalog, Issue:70, Page:032
SPECS: Rifle Spring - 12¾" length. Carbine Spring - 11½"