The FAL isn't my first choice for CQB but it is a very reliable weapon but if that's your cup of tea so be it .
1. Get the shortest barrel length offered by DSA
2. Get the Flash suppressor of your choosing DEFINATELY
NOT THE MUZZLEBRAKE.
3. Replace the dust cover with the scope mount sold by
either tapco or DSA.
4. Remember that the money invested in glass results in
joy on the range and good quality scopes last longer.
5.Be advised that the .308 is a full power cartridge & it
has a solid recoil & is rather loud especially in
confined spaces.
First off, the basic FAL rifle is heads and shoulders above any other NATO semiauto rifle in my estimation. It was the choice of around 100 nations, and parts and accessories are still easily available for it.
For any 308 semiauto you want at least a 20" barrel. It'd doubtful you'd gain much more velocity with more than 20".
My experience with DSA has been as follows. The basic rifle is very well made and functions very nicely in a mechanical sense. Nonetheless there has been a big problem with the Badger barrels, at least on the rifles they were selling three or four years ago.
DS claims or at least used to claim that those barrels REQUIRED a 180 grain or heavier bullet in order to achieve accuracy. 100 Yard groups with those barrels and ordinary NATO ammunition or 168-grain hunting loads looked like what I'd expect from a shotgun, i.e. were totally unacceptable.
The experience put Badger Barrels on my personal shitlist for life.
First off, I do not see how any firearm can be accurate with heavier bullets but not lighter. I mean, if you have the spin rate to stabilize a 180 grain bullet, it should also stabilize a 168 or 147 grain bullet.
Secondly, any firearm has to shoot the ammunition which is common or normal for it, and comman and normal for any NATO 308 rifle is 147 and/or 168 grain. To me, 168 grains is max for a 308, period. 180 Grain bullets means you're shooting a 300 winmag and 220 or more means you're shooting a 34 caliber rifle and not a 30.
I sent one such rifle back to DS with a very nasty letter attached and they replaced the Badger barrel with what they called an "experimental" barrel at the time, which does shoot normal 308 ammo accurately.
If I were going to order anything else like that, I would specify to the factory that I intended to shoot normal NATO ammo and 168 grain hunting ammo and that, if the thing did not shoot that stuff accurately, the rifle was coming straight back to them.
You might also want to consider either something from Springfield arms, or some sort of a less expensive FAL with an Imbel receiver and chromed Imbel or FN barrel.