HK MR556A1 - AR-15 Triggers Compatibility

Testing three different aftermarket AR-15 triggers for compatibility in an HK MR556A1 upper. Namely, the Wilson Combat TTU Single Stage, Timney 667S, and the KE Arms SLT-1

Timestamps
0:00 - Wilson Combat TTU
0:27 - Introduction
1:24 - Timney 667S
2:46 - KE Arms SLT-1 Introduction
3:03 - Wilson Combat TTU Issues
4:39 - KE Arms SLT-1 Initial Test
5:13 - DPMS Lower Disclaimer
6:45 - KE Arms SLT-1 Range Test

Originally uploaded on YouTube: 2022-07-23
Recording date: 2022-07-01