I bought 3 of them on Saturday. After Springfield Sporters sold all of their FFL rifles somebody who had bought a bunch of the barreled receivers sold them on Gun Broker I bought 8 of them at the time I followed the instructions from a guy called Steven H who had described building one using a No8 bolt head on the old lee Enfield site, run by a guy with the name of Mark Bitings as I remember. I built 2 of them at the time one as a Jungle Carbine and one as a No4 Mk1 T . As I only had the one No8 bolt head, I had to use the same bolt in both rifles. I have been stockpiling parts to build a couple of the other barreled receivers into rifles and my opportunity came this last Saturday when IMA lowered their price on the bolt heads. I was able find a couple of No 7 magazines with the .22 insert and they worked in my rifles. I have several of the real trainers a No9 2 No8s one Faz the other BSA a No7 Canadianicon a No7 English 2 Pattern 14 No 1 1 Pattern 14 No2 4 no2 Mk4 and a shortr.22 Mk11 I also have one of the Belgian No 4 Mk1 trainers that they built. I will look through my stuff and see if can find the original instructions from Steven H.