I’m considering a build with a dedicated AR9 pattern 80% lower with an upper and 9mm bcg. Parts are pretty much all Grid Defense as I love their stuff.
What sort of buffer tube, spring, block, end plate, is needed for such a build? I’ve heard the spring should be blocked in the tube as the AR9 bcg relies on blowback?
Any thoughts?
What sort of buffer tube, spring, block, end plate, is needed for such a build? I’ve heard the spring should be blocked in the tube as the AR9 bcg relies on blowback?
Any thoughts?