Turf said:I bought several Buffertech recoil buffers and put them on 3 of my Norincos. 2 of them had R33 op-rod spring guides and here is the strange part. On all 3 of them, even just after cycling the action, and just after shooting 4 or 5 rounds the spring had snaked its way through the buffer. I think the USGI springs are larger in diameter than the 'norcs. I ended up just taking them out. And at $15 US a pop it's a waste of money.