A5 buffer setup using A2 extension with spacer? - Printable Version +- 6.5 Grendel Forum (https://65grendel.com) +-- Forum: 6.5 GRENDEL DISCUSSION FORUMS (https://65grendel.com/forumdisplay.php?fid=3) +--- Forum: 6.5 Grendel ARs and Other Semi-Autos (https://65grendel.com/forumdisplay.php?fid=8) +--- Thread: A5 buffer setup using A2 extension with spacer? (/showthread.php?tid=26197)

A5 buffer setup using A2 extension with spacer? - Casswick - 01-13-2024 Im in process of planning out a 6.5 Grendel AR that will have a fixed stock, either the Magpul PRS or Fab RAPS. I would like to use a rifle length system as I already have the spare parts, and would like to try a low weight carrier and buffer setup. My intention is to try to make a A5 buffer system with a rifle length tube. Based on what I have found online: Carbine extension: 7 - 7.25" A5/SR25 extension: 7.75 - 8" Rifle extension: 9.5 - 10" Sources: https://www.ar15.com/forums/ar-15/Rifle-Buffer-Tube-Question/4-770078/ https://www.reddit.com/r/AR10/comments/p5mutt/775_buffer_tube/ So does it a fair assumption that putting a ~2" delrin spacer within a rifle tube would give it effectively the same internal depth as an A5 extension? Brownells has some premade options that could work, however they may add an extra 1/2" or more to convert into a carbine length rather than A5. https://www.brownells.com/gun-parts/rifle-parts/rifle-stocks-parts/ar-15m16-buffer-spacer/ https://www.brownells.com/gun-parts/rifle-parts/rifle-stocks-parts/ar-15-a2-stock-spacer/