This Botach KZ M73 Hand Guard from www.Botach.com is a simple two piece 4 sided 1913 Picatinny rail system. Made in the USA, CNC’d from 6061 Aircraft Grade aluminum, hard coat anodized with machine engraved position markings. Its current sale pricing (08/07/2013) of $39.99 makes this an incredibly affordable and worthwhile upgrade for your carbine length M4 or AR15. Even at its regular pricing of $89.99 its a bargain! When comparing Botach’s house brand, KZ (Kley Zion), up against my Daniel Defense, Knight’s Armament and Yankee Hill Machine hand guards…I found equally high quality among all brands, however, the five (5) Quick Detach (QD) Anti-Swivel Ports on the M73 set this hand guard apart, especially at this price point. The fitment is simple and secures tightly without movement. I have no negatives to point out with this product. Durability has never been in question, and has endured the beating I have brought its way both on my duty weapon and my own personal AR. Don’t hesitate to make the Botach KZ M73 Hand Guard your next M4/AR 15 upgrade! To purchase this KZ M73 Hand Guard directly from Amazon, you’ll find it at $79.95.