Quoted:Found
THIS item already to go but with a 5.5 inch barrel.
Areo products seem to be decent and the discounted price seems hard to beat.
Lots of threads discussing barrel lengths of 4.5 when used with a suppressor but not much about 5.5 inch barrels.
Jump on this or stick with original plan and build one with a 4.5 inch barrel?
What do I lose with a 5.5 barrel as opposed to a 4.5 inch.
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No Bolt or CH on the pictured upper. So add that price into to your completed gun.
As for my experience...
I have 4.5's on my two 9 m.m. AR pistols.
I had a six inch AR9, but I sold the barrel.
Because...
It cracked when suppressed, firing 158's.
The temp was in the low 20's which happens in Wisconsin.
So I got a 4.5 to replace it, because I didn't like the unpredictable suppressed performance.
O P. I would stick with your 4.5 inch upper plans.
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