overbarrels have very little volume in the rear section unless you go quite wide, weight/volume ratio is less efficient, can't be swapped between multiple guns (as made by most NZers anyway), also trap heat in the barrel etc
overbarrels have very little volume in the rear section unless you go quite wide, weight/volume ratio is less efficient, can't be swapped between multiple guns (as made by most NZers anyway), also trap heat in the barrel etc
Downsides: Heavier, no-one makes them in this country
Also I don't like overbarrel on an AR because I like to have a handguard as close to the muzzle as possible (ie 13" hg on 14.5" barrel) for control + sight radius reasons and I like slim handguards because fat ones are terrible. I also don't like the "suppressor inside handguard" thing.
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