I have a Bushmaster M-4gery.
For a 14 1/2" barreled gun it is incredibly accurate!
They use forged aluminum recievers (not castings) and are very durable.
The barrels are chrome lined and have a twist rate of 1:9 so they work well with bullets up to 68-70gr. weight.
I would reccommend it.
I also really like the Rock River rifles.
They are a " blast" to shoot!!!