They do them custom - you send your barrel to them - they modify it to 5 inch and add a shroud. Drops half the weight, real cool! I started with a plain PC carbine and modified it - the only thing that is stock is the main receive frame, barrel connection system and bolt. Every thing else is updated/changed. It is a real nice gun, just still to heavy. If I were to do it again, I would buy a PC charger, have Wiland shroud the barrel to 16 inches and add a rifle stock and TACCOM shroud or just add a foam grip to the Wiland shrouded barrel. The one thing that is different about the Wiland modified barrel is he can not get rid of the sight mount on the rifle barrel so you still have that flat spot. I think it is ugly but total functional. If you use the charger setup, there is no sight mount on that barrel so it should be much cleaner! I have the Tandemkross Upriser stock the does move the mag release to a much more usable spot. I do not remember who made a different mag release for the standard chassis that moved it back? If it would work on the charger chassis then that would solve the issues with standard mag release for me.