Thanks to the kind gentleman above I recently put together a Lilja 14.5" barrel, using the vltor a5 and a tubbs fw spring that has 42 coil count. I've been slowly breaking in the barrel per Lilja's directions and haven't even shot for any groups yet but man is this thing smooth. I decided upon not using an adj gas block at the moment and that I would use the buffer weights to compensate if need be so I've been playing with the tungsten weights to see how they affect function.
Started with the A5H1, holding the gun very loosely when firing and it seemed to send the brass a bit more forward than I'm accustomed to with a properly gassed system. Tried it with 2 tungsten weights (A5H2) and I believe that is the potential sweet spot as in feel as it indeed changed the brass ejection slightly and just because I could I made an A5H3 to see what it would do with the casings which piled up in a nice pile being a bit closer to 3:00 or so. Full lock back on empty using all configurations, no dented brass from bouncing off the deflector, though that said I had previously cut about a 1.5 coils off the ejector spring. Hornady American Gunner ammo used for all break-in/function testing.
Now that I've taken the time to do the recommended break-in the plan is to run it this weekend and to see just where I am going with buffer weights on this build. As mentioned by feel I think I'll end up with it being an A5H2 but time will tell. With an adj block you could likely easily go to A5HO and if you happen to have a std carbine spare buffer in your box I would buy the A5H2 just to have the option of having a couple of tungsten weights you could play with as the price difference is only a few bucks. I originally bought the A5H1 and had planned on buying some T-weights anyways as I needed one or two for another gun. I am really liking the Vltor tube/buffer combo, it threaded in perfectly leaving the bolt face right where it should be just in front of the ejection port when manually pulled back to rear which isn't always the case with other receiver extensions.
I would buy this set-up again without a doubt as it's quiet, feels really smooth.
Started with the A5H1, holding the gun very loosely when firing and it seemed to send the brass a bit more forward than I'm accustomed to with a properly gassed system. Tried it with 2 tungsten weights (A5H2) and I believe that is the potential sweet spot as in feel as it indeed changed the brass ejection slightly and just because I could I made an A5H3 to see what it would do with the casings which piled up in a nice pile being a bit closer to 3:00 or so. Full lock back on empty using all configurations, no dented brass from bouncing off the deflector, though that said I had previously cut about a 1.5 coils off the ejector spring. Hornady American Gunner ammo used for all break-in/function testing.
Now that I've taken the time to do the recommended break-in the plan is to run it this weekend and to see just where I am going with buffer weights on this build. As mentioned by feel I think I'll end up with it being an A5H2 but time will tell. With an adj block you could likely easily go to A5HO and if you happen to have a std carbine spare buffer in your box I would buy the A5H2 just to have the option of having a couple of tungsten weights you could play with as the price difference is only a few bucks. I originally bought the A5H1 and had planned on buying some T-weights anyways as I needed one or two for another gun. I am really liking the Vltor tube/buffer combo, it threaded in perfectly leaving the bolt face right where it should be just in front of the ejection port when manually pulled back to rear which isn't always the case with other receiver extensions.
I would buy this set-up again without a doubt as it's quiet, feels really smooth.