HK MR556A1 Upper Receiver 5.56mm
$2,169.00
Caliber: 5.56 NATO / 223 REM
Barrel: 16.5″ 1/7 twist barrel
Handguard: M-LOK Handguard
Action: Short Stroke Gas Piston
Additional Info: Includes BCG, Buffer, and Spring
Out of stock
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