DPMS AR-15 Mil-Spec Carbine Buffer Spring One Size. Build maintain or upgrade your AR-15 today DPMS is your source for quality AR-15 parts and accessories. Specifications for DPMS AR-15 Mil-Spec Carbine Buffer Spring: Manufacturer: DPMS Finish: Natural Gun Make: AR Platform Gun Model: AR-15 Package Contents: DPMS AR-15 Mil-Spec Carbine Buffer Spring What firearm models does the manufacturer say DPMS AR-15 Mil-Spec Carbine Buffer Spring is compatible with? The manufacturer suggests that DPMS AR-15 Mil-Spec Carbine Buffer Spring is compatible with AR-15DPMS DP410: AR-15 Mil-Spec Carbine Buffer Spring One Size