Quote Originally Posted by Shed tuner View Post
presumably when it had a silencer attached ?

It's only an M10 fine thread IIRC, so pretty delicate - ~ 8mm core dia with a 5.5mm hole thru it..
Would have seen it had I a 10mm silencer,the thread protector masked the problem,I fired over 250 shot before finding the problem my right arm resembled Popeye's and left leg had has a bruise 6" round where I placed the rifle to cock it,the next step was to use it as a javlin.