Update: I returned this rifle to Tenda and asked for a replacement. I asked them to inspect the replacement before sending to ensure function. The new one arrived. Yes, the bolt would go in, buuuut, it would not open or go back to cycle without the use of a rubber mallet! I sh$t you not. I couldn't believe it. This is why I seldom buy new guns of any sort. Anyway, I sent this one back and told them I'm giving up on Norinco JW-15A.... this shipment is no good! I fortunately found a used one on the EE last week and grabbed it. Interesting... it's a 5 shot mag, maybe a replacement. Almost flush. So buyer beware on the new JW-15As!