Hk11e,Hk21e,G8 221230 Spring, Buffer, Inner - Spring, Buffer, Inner

B&T HK MP5 3x NAR Handguard BT-21358

B&T Telescopic Stock Fits HK MP5/MP5SD

B&T HK MP5K/SP5K Telescopic Stock BT-200598

B&T USA Telescopic Brace Fits Heckler & Koch SP5 Black - Adjustable Telescopic Brace for Improved Stability and Performance - 200601

B&T HK SP5K 5-Position Adjustable Telescopic Brace w/Elastomer Buffer BT-200602

HK MR556 Upper Receiver Kit w/Bolt, Buffer Spring, M-LOK, & Barrel Assembly 81000584

Heckler & Koch HK MR556 12.5" Black M-LOK Handguard 51001100