HK416 / MR556 Bolt Carrier Groups
Ensure flawless reliability in your HK MR556/416 platform. Choose from original HK bolt carrier groups, US-made variants, enhanced carriers, chrome-lined options, complete bolt carrier groups, and semi-auto carriers.
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Out Of StockOn Sale
MR556 Upper Receiver Kit -16.5" - M-LOK
H&K Heckler & Koch
Now: $1,601.96Was: $1,779.95New HK Factory German MR556 Upper Kit with M-LOK forearm Includes: Complete MR556 upper receiver with M-LOK forearm MR556 Bolt group Complete Tungsten Filled HK Buffer HK Buffer Spring One 30 Round HK Steel Maritime Magazine No FFL required as the...Now: $1,601.96Was: $1,779.95 -
On Sale
HK416 A5 Bolt Carrier - Complete
H&K Heckler & Koch
Now: $1,750.50Was: $2,349.95German H&K HK 416 A5 Bolt Carrier Complete Get your hands on that critical puzzle piece for your factory-correct 416A5 build. Fully assembled and ready to drop into your uper receiver. Bolt carriers may be marked ".223 Rem" or "5.56 x 45"...Now: $1,750.50Was: $2,349.95 -
On Sale
HK416 A5 Bolt Carrier
H&K Heckler & Koch
Now: $1,497.95Was: $1,997.95H&K HK416 A5 Bolt Carrier Factory HK416 A5 full auto bolt carrier. This carrier is backwards compatible with earlier HK416 A1 and A3 variants. Features the updated captive firing pin retaining system. Compatible With: HK416 A5 HK416 A1 HK416...Now: $1,497.95Was: $1,997.95