Headspace Gauge 5.56 NATO Max Chamber
Updated August 30, 2026
| Lot number | 377 |
| Auction | Chicago Premier Gun Auction |
| Date | September 18, 2026 at 6:00 PM CDT |
| Auction house | South Texas Auction Company, LLC |
| Location | Brownsville, Texas |
Headspace Gage 5.56 NATO--1.4736" plus zero minus .0003" (maximum chamber)
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