Sig Sauer 556 for sale
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Sig Sauer Mcx, Sig Pmcx-556n-11b-lt 5.56 Nat 11.5 30rd Coy And
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
11.5" Carbon Steel
Caliber:
5.56×45mm NATO
Capacity:
30+1
Finish Per Color:
Coyote / Black
(0)
Sig Sauer MCX SPEAR-LT 5.56 NATO 11.5
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
11
Caliber:
5.56×45mm NATO
Capacity:
30+1
Finish Per Color:
Coyote / Black
Marketplace Insights
★ 5.0/5
based on 8 customer reviews across 3 variants from 19 retailers
Unanimous 5-star reviews praising this rifle as a significant improvement over the Virtus, with users highlighting superior ergonomics, accuracy, and thoughtful design refinements.
What customers like
Improvement over Virtus63%
A genuine improvement over the Virtus. Small weight savings, steel QD inserts
Accuracy and handling50%
it's very accurate and lightweight, and I'm loving the ss piston
Design and ergonomics50%
balance is spot on making it easy to maneuver and shoot
Quality and reliability38%
Great quality, fit, and finish. Nice two stage trigger
Common concerns
Frequently Asked Questions
Sig Sauer 556 for sale
Is the Sig 556 discontinued?
Yes, SIG Sauer discontinued the 556 line, including the 556 Short SF, 556 Patrol, and 556R models. The company shifted focus to their AR-platform Tread rifles and MCX platform instead. Used 556 rifles remain available through secondary markets.
Is the Sig 556 a good rifle?
Whether it's good depends on your needs. Owners report the 556 delivers reliability, accuracy, and minimal recoil in 5.56 NATO. It's heavier than comparable AR rifles, which affects carry weight. Since SIG discontinued the line, you'll find used models on secondary markets. Modern alternatives like the MCX-SPEAR LT are currently in production.
How much is the SIG MCX 5.56 rifle?
SIG's current 5.56 NATO rifle is the MCX-SPEAR LT, with listings starting at $2,299.99 and ranging up to $2,818. Three variants are available across 19 retailers. Older MCX 5.56 models are discontinued but can be found used on secondary markets.
What caliber is the SIG 556?
SIG 556 rifles came in two main calibers. Most models, including the 556 Short SF and 556 Patrol, fired 5.56x45mm NATO. SIG also made the 556R variant in 7.62x39mm, which used AK-pattern magazines. All 556 models are now discontinued.