Generally I'm not a fan of short barelled carbines. With the 308 a 20" barrel is as short as I usually like to go. That being said 16" is a lot handier.
One of the issues with 16" or shorter 308 rifles is reliability. Loss of velocity is of course the second concern. KAC went with a rifle length gas system for their 16" which seems to work very well and is soft to shoot. Most use a carbine length gas system and over gas to keep it reliable with varying degrees of sucess.
Which brings us to the piston systems. PWS has a couple short barelled products. They use an AK like long stroke piston setup and come with SS barrels. Around $3200. Sig 716 uses a short stroke system and is said to be decent and it's cheaper. But I don't think the barrel is match grade. HK also has a short stroke piston although cost and the lack of short barreled options for the public rules it out.
I'd either reconsider barrel length, look at the PWS or wait a bit until what you're looking for hits the market. There are new products in the AR308 market all the time. ADCOR was rumoured to be making a 308. Also more barrel options could come up.
I'm afraid you'll have to do your homework on this one. But that's half the fun of any purchase anyways.
One of the issues with 16" or shorter 308 rifles is reliability. Loss of velocity is of course the second concern. KAC went with a rifle length gas system for their 16" which seems to work very well and is soft to shoot. Most use a carbine length gas system and over gas to keep it reliable with varying degrees of sucess.
Which brings us to the piston systems. PWS has a couple short barelled products. They use an AK like long stroke piston setup and come with SS barrels. Around $3200. Sig 716 uses a short stroke system and is said to be decent and it's cheaper. But I don't think the barrel is match grade. HK also has a short stroke piston although cost and the lack of short barreled options for the public rules it out.
I'd either reconsider barrel length, look at the PWS or wait a bit until what you're looking for hits the market. There are new products in the AR308 market all the time. ADCOR was rumoured to be making a 308. Also more barrel options could come up.
I'm afraid you'll have to do your homework on this one. But that's half the fun of any purchase anyways.