SCAR47, SCAR556, SCAR300 Lower Receiver – USSOCOM Username or Email Address Password Remember Me This is a secure area. To request access to this content, please send an email from your .mil or .gov email address to firstname.lastname@example.org for authentication. Otherwise, please fill out the following form and we will be in touch as soon as possible. In early 2011 members of Handl Defense LLC were inspired to create a trigger module that would accept SR-25 (M-110) magazines. Soon thereafter members of USSOCOM began to assist in direction and development of the SCAR 25 trigger module. Handl Defense LLC expanded its efforts; and began the Mk.17 and Mk.20 Enhancement Program. Based on direct input from members of USSOCOM, Handl Defense LLC developed a 6 phase program to provide cutting edge production and technology based solutions to enhance operational use. Your Name* Your Email* Subject Your Message * Required fields.