MDT XRS Chassis System - Remington 700 SA - Flat Dark Earth Muzzle Devices the EPC bolt assembly is

the EPC bolt assembly is precision machined from the ground up to meet the extreme demands of blowback AR platform firearms

but unlike the latter it cannot be used to mount SureFire SOCOM suppressors

Internal width 2

Solid M-LOK boss to withstand repeated recoil

Daniel Defense MFR

MDT XRS Chassis System - Remington 700 SA - Flat Dark Earth Muzzle Devices the EPC bolt assembly isThe XRS Chassis is designed for shooters that want the fit and feel of a traditional shaped rifle stock with the benefits of a modern precision rifle chassis system. Each XRS Chassis is constructed from a full length CNC machined core of 6061 aircraft grade aluminum wearing high strength textured polymer panels for insulation from the elements. The precision aluminum V block bedding system ensures fit and function to maximize the accuracy of any rifle