sig m400 upper specification

snowshovel

Google 一下居然没找到m400的specification。就是一些很基本的信息如下。看照片应该是enhanced，无铁瞄，有BCG和CH。$400算deal吗？
THE SIGM400 SERIES ENHANCED RIFLE, is designed for use in law enforcement, military operations, the sporting field, as well as competitive shooting. The SIGM400 is a true AR platform tactical rifle with unparalleled accuracy. A 16” Nitride treated barrel provides superior corrosion resistance and adds to the durability and reliability that users come to expect from SIG SAUER. This black version with black polymer Magpul MOE forend.

SKU	UAM400-16B-ECP-SI
Caliber	.223 / 5.56
Manufacturer	Sig Sauer
Barrel Length (in)	16.0 in
Accessory Rail	Not Applicable