ERGO M-LOK MOSSBERG 12-GAUGE 500/590 RAIL (SHOCKWAVE)
- M-LOK forend for 12-Gauge Mossberg 500/590
- M-LOK rails at 3, 6, and 9 o’clock
- Extremely lightweight and low profile.
- Hard Black type III anodized 6061-T6 Aluminum
- Comes complete with 3 black 4332 M-LOK Rail Covers
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