Hi there. I am considering purchasing a used Norinco NHM-91 rifle posted on Gunbroker. The price is $679.00. Examining the pictures on the rifle I see that there is some cracking on the thumbhole buttstock near the receiver. Are these stocks easily removed to be repaired or replaced with another stock. To remain compliant witht he Federal law if the thumbhole stock is replaced with a pistol grip and separate buttstock there has to be a number of U.S. made parts installed is that correct. The gun has one more day on the auction and then it finishes. I contacted the business and they told me to get some info I have to phone back tomorrow to talk to the guy who does the listings as it is separate from their store. The Gunshop is Double Eagle Pawnbrokers in Spokane. I would like to drive down there and check it out first hand. I have always shot my Tula made SKS and my Norinco SKS so I like the 20 inch barrel this rifle has. Looks like a nice rifle. Any input is appreciated. Thanks.