Sig Sauer M400 Price Guide: What to Pay in 2025
Published 2026-03-23 · GunDeal Alerts
· Price range: $527-$651
Price Distribution
Great Deal
Good Deal
Average
Above Average
Looking for the best price on a Sig Sauer M400? We track every deal posted to r/gundeals so you know exactly what a good price looks like — and when to buy.
What Should You Pay for a Sig Sauer M400?
Based on 5 deals tracked from r/gundeals, here’s what the market looks like for the Sig Sauer M400 chambered in 5.56 NATO:
Sig Sauer M400
Great <$527
Good $527-$589
Avg $589-$651
High $651+
Based on 5 deals tracked on r/gundeals
Price Breakdown
- Great deal: Under $527 — buy with confidence
- Good deal: $527–$589 — solid price, worth grabbing
- Average: $589–$651 — fair but nothing special
- Overpaying: Above $651 — wait for a better deal
Based on our Sig Sauer M400 price tracker — updated with every r/gundeals post.
Recent Sig Sauer M400 Deals from r/gundeals
- $400 — [Parts] LE Trade-in Sig M400 5.56 Complete URG 10.5" - Quad Rail & ASR Mount - $400 (Price Drop) from aimsurplus.com (50 upvotes)
- $649 — [Parts] Sig Sauer M400 16" Complete Upper - $649 + $15 shipping from acmesportsinc.com (0 upvotes)
- $499 — [Parts] Sig m400 10.5 upper w/ BCG, CH, Quad rail & Sico Asr FH $499 from aimsurplus.com (7 upvotes)
- $650 — [Rifle] Leon Trade-In Sig M400 Tread 5.56, Stainless 16" 1/8 Barrel, Pined Stainless Gas Block, 3 Pr from aimsurplus.com (32 upvotes)
- $749 — [Rifle] Sig Sauer M400 TREAD 5.56x45 30rnd 16" $749.99 + Free shipping from joeboboutfitters.com (49 upvotes)
View all Sig Sauer M400 deals and full price history →
How to Get the Best Sig Sauer M400 Price
- Set up an alert. Add “Sig Sauer M400” as a keyword in your alert preferences and we’ll email you the moment a deal posts.
- Know your target price. Anything under $527 is a strong buy. Don’t pay above $651 unless you need it today.
- Check the price history. Our Sig Sauer M400 product page shows every deal we’ve tracked with price trends over time.
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