Best back up for sniper

What is a good back up weapon for a sniper? I am talking for the money pretty cheap, and also where can you find ghillie suits for the best price??

Will the aep's last a long time

Both are built well and should last a long time. I own both and they are good sidearms. I suggest getting the g18c since they have 88rd extended clips available. I still cant find ones for the USP without rigging the g18's to fit. I would also look into the Y&P line of non-blowback pistols, esp. the Mk23. The silencer that it comes with has an internal barrel extension so with green/red gas you could actually fire fps around 400+. The range and accuracy of the gun are also incredible. The silencer doesnt dampen anything, but the gun itself shoots very quie since it's a nbb. I owned this gun for a couple years before selling it and I miss it. It's perfect for a sniper. Pretty cheap too (50-60 I think).