You can buy an HK 416b, which is a 22 caliber version of the 416 for about $450. It looks very similar, although there are some internal differences. Its a ton of fun to shoot, and since it uses 22LR...
On the us market, for an actual, Heckler & Koch made and imported HK91, between $3000 - $4000. You can buy a PTR91 clone, which is made with 922r compliant, US made parts, for between $1000 -...