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Identifying Gas Pistons - Top to bottom: 1)Sadlak Industries, LLC titanium nitride M14 NM 2) Sadlak Industries, LLC titanium nitride M14 3) Springfield Armory, Inc. M1A 4) USGI M14 5) Smith Enterprise, Inc. thin dense chromium plated M14/M21A5 6) Mainland Chinese M14. Photo by Different.
| Description | : | 1) Sadlak M14 NM - longitudinal groove and gold color 2) Sadlak M14 - gold hue with no longitudinal groove 3) SA, Inc. M1A - visible machining marks on the round and flat surfaces of the tail section 4) USGI M14 - smooth and polished finish on all surfaces 5) SEI M14/M21A5 - completely chromium plated with a slight frosty appearance on the tail 6) Mainland Chinese M14 - finned texture on the tail section. |
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