The Sons of Liberty Gun Works M4-L89 Upper Receiver Group is an upper receiver or conversion kit. Details: Upper Receiver; 5.56 NATO.
Manufacturer Part #: U-M4L89-556-145-ASR. RSR description: see source (not copied to Description); dims 30.50 x 3.25 x 3.00
Manufacturer Part #: U-M4L89-556-145-ASR. RSR description: see source (not copied to Description); dims 30.50 x 3.25 x 3.00
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