Evening Kev, 12" without. The FE screws off, as per the original.
I spent a few hours shooting groups this afternoon, keeping an eye on the gathering thunder stops that thankfully rolled past my local range....
I was managing to shoot half inch groups of 5 rounds at 25 yards, resting on my gun case.
A single failure to cleanly extract in a box of 50 rounds CCI Maxi Mag Varmit, happy with that..
They certainly need more regular cleaning though, the powder leaving 'burnt ball' residue on the bolt group and breech face. If I was putting a few hundred rounds downrange in one sitting, I would clean it after 100, or the residue will likely start to cause an increase in failures.
Great fun to shoot, highly recommend....