The new front in the Hong Kong store offer is a product called C&C Tac MK16 M-Lok 13.5 Rail for PTW (DDC). Under this name we will find a copy of the SMR MK16 front manufactured for real firearms by Geissele Automatics. The above-mentioned company is the current trendsetter in the production of trigers, especially for the AR15 platform, and innovative rails and fronts for a wide range of rifles.
It was in the SMR MK16 front that the USSOCOM used in their latest modification of its M4A1 rifles called the URG-I (Upper Receiver Group-Improved).
Owners of PTW carbines can therefore make their replicas match the latest carbines of American special forces. The kit includes a 13.5-inch SMR MK 16 front in the M-Lok system (also recently adopted as a standard by USSOCOM), the so-called barrel nut (a nut fixing the barrel to the upper receiver) with 1-1/4" x 18TPI hread, and all screws needed for assembly.
Price of the set is 162$
Source: https://www.popularairsoft.com