Dbst A2 Shorty Buffer Tube

The Doublestar Corp Dbst A2 Shorty Buffer Tube is a purpose-built AR-15 receiver extension designed specifically for compact and entry-length configurations. This shorty A2 buffer tube enables builders to create shorter, more maneuverable rifle profiles while maintaining full compatibility with Doublestar's ACE Entry stock system—ideal for operators requiring reduced overall length without sacrificing functional AR-platform ergonomics.

At 7 inches in length and weighing just 0.19 lbs, this buffer tube reduces the footprint of your AR-15 build compared to standard carbine or rifle-length extensions. The A2-profile design maintains dimensional consistency with mil-spec lower receivers, ensuring reliable cycling with standard spring and buffer systems. Note that this tube does not include a carbine buffer or spring—those components must be sourced separately to complete your build and achieve proper bolt carrier group velocity and dwell time.

The shorty buffer tube is favored by tactical professionals and serious hobbyists building SBRs (short-barreled rifles), close-quarters patrol carbines, or precision AR pistol platforms where compactness matters. Pairing this tube with the ACE Entry stock creates a genuine entry-length system—common in law enforcement, military, and civilian defensive configurations where vehicle storage, building clearance, and rapid deployment are operational considerations. Doublestar's reputation in the AR component market makes this a reliable foundation for any short-length build.