The Krytac Kriss Vector Alpine is a good gun however better guns can be bought for way cheaper. If yo are looking to by a Kriss Vector that is rare, this is the way to go. However if you want to buy a Kriss vector that is purely for good functionality buy a normal Krytac Kriss vector. Important to understand that the alpine barrel is 2cm longer than the normal Kriss vector this affect barrel attachments. The stock is adjustable which is very nice however the only sling attachment point is a QD sling attachment slot. And it is at the end of the stock. When a sling is connected the gun is almost scraping the ground (I am 1.80 meters). The spring change is quick however inserting the pins is very difficult while holding down the spring. When i got the gun It shot at 0.83 joules with .25g bbs (original sp90 spring I believe). I got 1 joule after upgrading to sp120 and 1.15 joules after the sp130. It runs very well now. Important to find small battery and use the 11.1 for good fire rate. Good gun. I added Thor and Viktor hand guard and tracer unit.