HK416 / MR566 Small Parts
Our selection includes every essential small part for your HK MR556 or HK416 rifle – pins, springs, detents, gas rings, firing pins, and more.
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On Sale
HK416, MR556 Ejection Port Spring
H&K Heckler & Koch
Now: $8.96Was: $9.95H&K HK MR556/416 Ejection Port Spring Compatible With: HK MR556 HK 416Now: $8.96Was: $9.95 -
On Sale
HK416, MR556 Ejection Door Lock Roll Pin
H&K Heckler & Koch
Now: $4.46Was: $4.95HK MR556 & HK416 Ejection Door Lock Bolt/Roll Pin Compatible With: HK416 A1, A3, A5 HK MR556 A1, A4Now: $4.46Was: $4.95 -
On Sale
HK416, HK417, MR556, MR762 Detent Takedown Pin
H&K Heckler & Koch
Now: $8.96Was: $9.95H&K HK MR556/MR762/416/417 Detent Takedown Pin Factory H&K takedown pin for MR556 A4. Compatible With: HK MR556 HK 416 HK MR762 HK 417Now: $8.96Was: $9.95 -
On Sale
HK416, MR556, MR762 Bolt Catch Pin
H&K Heckler & Koch
Now: $4.46Was: $4.95H&K HK MR556/MR762/416 Bolt Catch Pin The factory roll pin is used to hold the bolt catch in place. Great to have on hand in the event this item becomes lost or damaged when doing maintenance Compatible With: HK MR556 HK 416 HK MR762Now: $4.46Was: $4.95 -
On Sale
HK416 A1, MR556 Barrel Nut
H&K Heckler & Koch
Now: $48.56Was: $53.95Heckler and Koch Barrel nut for MR556A1 rifle All steel barrel nut. This item is a must-have repair and replacement part for removal or when you have any work done to your barrel, as the barrel nut may become damaged in the removal and...Now: $48.56Was: $53.95 -
On Sale
HK MR556 Receiver Take Down Tool
H&K Heckler & Koch
Now: $17.95Was: $19.95H&K HK MR556 Receiver Take Down Tool This part is the tool used to tighten down the stock movement on the E1/E2 stock. Each tool will be stored in the rear of the E1/E2 stock. Compatible With: HK MR556 Please Note: We get...Now: $17.95Was: $19.95 -
On Sale
HK416, MR556 Takedown Pin - Front - A1 Style
H&K Heckler & Koch
Now: $58.46Was: $64.95H&K HK MR556 Front Lower Receiver Locking Pin With Spring Loaded Detent This part is the front (large) takedown pin with ball detent and locking mechanism installed. The idea behind this type of system is to decrease the movement of the upper and...Now: $58.46Was: $64.95 -
On Sale
HK416, MR556 Firing Pin
H&K Heckler & Koch
Now: $49.46Was: $54.95H&K HK MR556/416 Firing Pin New HK German manufactured. This is a great item to have on hand as the firing pin is one of the most abused components in the HK MR556 and HK 416 weapon systems. Compatible With: HK MR556 HK 416 HK CR556 HK...Now: $49.46Was: $54.95 -
Out Of StockOn Sale
HK416, MR556 Ejection Port Cover Door Assembly
H&K Heckler & Koch
Now: $80.95Was: $89.95HK German HK 416, MR556 Ejection Port Cover Door Assembly Complete This is the newer polymer style cover found on the latest HK 416 and MR556's. This is the complete ejection port door assembly needed on all AR15 or MR556/HK416 models. Can also be used...Now: $80.95Was: $89.95 -
On Sale
HK416 Retaining Pin - Firing Pin - Enhanced
H&K Heckler & Koch
Now: $17.95Was: $19.95HK 416 Firing Pin Retaining Pin- New Style This part is the newer style pin that is goldish, super hardened, and much less prone to wear and tear. The enhanced version is the most robust, easiest-to-use pin available. Compatible With: HK 416 AR15, M4...Now: $17.95Was: $19.95 -
On Sale
HK416, MR556, MR762 Forward Assist Pin
H&K Heckler & Koch
Now: $4.46Was: $4.95H&K HK MR556/MR762/416 Forward Assist Pin Compatible With: HK MR556 HK 416 HK MR762Now: $4.46Was: $4.95 -
Out Of StockOn Sale
HK416, MR556 Magazine Catch
H&K Heckler & Koch
Now: $45.86Was: $50.95H&K HK MR556/416 Magazine Catch New HK German manufacture magazine catch for the HK 416 and MR556 family of firearms. Compatible With: HK MR556 HK 416Now: $45.86Was: $50.95