Hit the range with @karmapolice yesterday and at one point I set my rifle down and observed the pic below. Daniel Defense Form 4 MK18 with their aluminum QD endplate factory staked. 2012 transfer, so probably 2011 gun with maybe 10K on the lower. 100% FAIL! I re-torqued it and staked it on the other side when I got home last night, but a proper steel endplate will be ordered and installed shortly. THIS is why proper assembly procedures matter.