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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HK416, MR556A1, MR556A4 Bolt Group - Complete
H&K Heckler & Koch
$529.95H&K HK MR556/A4 Complete Bolt Group Complete bolt carrier group for MR556A1/A4 receivers. A perfect part to have as a spare. Bolt carriers will be marked ".223 Rem" or "5.56 x 45". Includes The Following HK German Factory Parts: MR556 Bolt...$529.95 -
HK416, MR556 Bolt Carrier
H&K Heckler & Koch
$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...$397.95