So I'm building an aero m5 and ordering a custom barrel and I'm wondering if anyone has used an oversized barrel extension and thermal fit the barrel to the upper? I've used the steel shim and permatex sleeve retainer method on ar15s before and it turned out good but was reading about using an oversized extension instead and thermal fitting the two together. Seems like it would be so much easier than the shim method.
Any suggestions on where to order an oversized extension and what size it would need to be for the m5 upper? Thanks!
Any suggestions on where to order an oversized extension and what size it would need to be for the m5 upper? Thanks!