I have several parts that fit the following:

HK 416 - HK MR556 - BRN-4 ( Brownells HK Clone)

Feel free to request more photos.

1. HK 12.5" M-Lok Handguard (New in wrapper) $120

2. HK Charging Handel ( 1 NEW $75 & 1 Very Good $60 ) Works with  milspec 5.56 /223 uppers

3. HK 416 E1 Buttstock ( Very Good) $99

4. HK 416 Buffer and Buffer Spring (Excellent) $50

5. HK 416 Battle Grip (Excellent) $40

6. Strike Industries 11" Gridlock Full Duty Handguard Cerakoted (excellent) This size and model are very hard to find. $160 obo