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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On Sale
HK MR556 A1, A4 Bolt Group - Complete
H&K Heckler & Koch
Now: $476.96Was: $529.95H&K HK MR556A1 and A4 Complete Bolt Group Complete semi-auto bolt carrier group for MR556A1/A4 receivers. Bolt carriers will be marked ".223 Rem" or "5.56 x 45". Includes The Following: MR556 Bolt Carrier Complete bolt head Firing pin...Now: $476.96Was: $529.95 -
On Sale
HK416, MR556 Bolt Carrier
H&K Heckler & Koch
Now: $358.15Was: $397.95H&K HK MR556/416 Factory Bolt Carrier With The Newer Style Bolt Retaining Key This is the factory one-piece carrier that has the out-of-battery disconnect and the bolt retaining latch assemblies installed to make up the HK MR556 (556...Now: $358.15Was: $397.95