The gun is a lot of fun, is very accurate,functions well,given its a Century build and a carbine.The bad is they need to be inspected in person first.Some builds are finished better then others.Bolt gap needs to be measured to make sure that it is correct.Some Century builds were built incorrectly.Also bolt gap needs to be rechecked after use to see if it has changed.Some Guns loose there gap because of a improper way of pinning the barrel.Google C93 bolt gap for more info.With that being said I think bolt gap spec might be overblown topic,as many of these guns function great with a low bolt gap.I love my C93.Hk roller lock guns are fun!!! The price is right and Century will fix a bad gun,but there warranty is short and make sure its current or be ready to take a gamble!