Uploaded June 2026 | Updated September 2026, 2 weeks ago
Buffer tube alignment directly affects whether your upper and lower receiver fit together properly. In this Real Avid Tech Tip, Dustin shows you how to position your buffer tube receiver extension inside the lower receiver to avoid upper receiver interference—and explains why one extra turn causes problems.
How do you align a buffer tube correctly? Position the tube so the detent hole for the buffer retaining pin is clear, then back off one full revolution. This ensures the tube sits flush and won't protrude against the upper receiver when assembled.
This applies to both mil-spec buffer tubes and JP SCS systems. The procedure prevents fitment issues that require disassembly to fix and teaches you what proper receiver extension placement looks like.
Whether you're building your first AR15 or customizing a rifle, getting buffer tube alignment right saves time and ensures reliable upper/lower receiver fit.
#RealAvid #GunDIY #AR15Building #ReceiverExtension #AR15Assembly
Holds lower receiver securely during buffer tube installation: realavid.com/products/smart-fit-ar15-vise-block
Stable platform for AR15 lower receiver work: realavid.com/products/master-gun-vise
Complete AR15 build toolkit with torque wrench for receiver extension: realavid.com/products/armorers-master-kit-ar15-pro
Buffer tube alignment directly affects whether your upper and lower receiver fit together properly. In this Real Avid Tech Tip, Dustin shows you how to position your buffer tube receiver extension inside the lower receiver to avoid upper receiver interference—and explains why one extra turn causes problems.
How do you align a buffer tube correctly? Position the tube so the detent hole for the buffer retaining pin is clear, then back off one full revolution. This ensures the tube sits flush and won't protrude against the upper receiver when assembled.
This applies to both mil-spec buffer tubes and JP SCS systems. The procedure prevents fitment issues that require disassembly to fix and teaches you what proper receiver extension placement looks like.
Whether you're building your first AR15 or customizing a rifle, getting buffer tube alignment right saves time and ensures reliable upper/lower receiver fit.
#RealAvid #GunDIY #AR15Building #ReceiverExtension #AR15Assembly
Holds lower receiver securely during buffer tube installation: realavid.com/products/smart-fit-ar15-vise-block
Stable platform for AR15 lower receiver work: realavid.com/products/master-gun-vise
Complete AR15 build toolkit with torque wrench for receiver extension: realavid.com/products/armorers-master-kit-ar15-pro
