Sig Sauer M400 SDI SENTRY | 5.56 NATO | 16" | RM400-SDI-16B-R5FX

UPC: 798681716128 MPN: RM400SDI16BR5FX SKU: 86798378

Sig Sauer M400, Sig Rm400sdi16br5fx M400 Sdi 556 16 Tele 223 Rem | 5.56 Nato Firearm (30-Round)

Name: Sig Sauer M400, Sig Rm400sdi16br5fx M400 Sdi 556 16 Tele 223 Rem | 5.56 Nato Firearm (30-Round)
Brand: Sig Sauer
SKU: 86798378

Firearms Rifles Centerfire Tactical Sig Sauer SKU: 86798378 In StockOnline Only

$1,667.00

$2,077.60 MSRP

Save $410.60 (20%)

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Compare all offers for Sig Sauer M400 SDI SENTRY | 5.56 NATO | 16" | RM400-SDI-16B-R5FX (798681716128)

Quick Specs

Caliber 223 Rem | 5.56 NATO,5.56 NATO

Capacity 30+1

Insight Snapshot

Darmok Firearms lists this offer at $1,667.00, 20% under MSRP.

Sig Sauer M400 SDI SENTRY | 5.56 NATO | 16" | RM400-SDI-16B-R5FX anchors the Firearms segment in the firearms catalog, giving shoppers a clear baseline before purchase.
Chambered in 223 Rem | 5.56 NATO, it keeps ballistics predictable across practice and defensive loads without forcing you to rework your kit.
Factory materials note a semi-auto action, which influences recoil timing and maintenance cadence.
Standard capacity lands at 30+1, so plan your range loadout around how often you expect to top off.

Shopping Tips

The featured offer reflects a 20% savings versus MSRP; use that benchmark when negotiating.
Line up your receiving FFL early and clarify their transfer fees so you are not surprised at pickup.

Ownership Checklist

Confirm the receiving FFL is ready for the transfer and understands the model you are purchasing.
Review Not found, Not found requirements on storage, transport, and waiting periods before the firearm arrives.
Source 223 Rem | 5.56 NATO practice ammunition early; popular loads tighten in supply when prices drop.

Common Questions

What specs should I know before buying Sig Sauer M400, Sig Rm400sdi16br5fx M400 Sdi 556 16 Tele 223 Rem | 5.56 Nato Firearm (30-Round)?

Key callouts include caliber: 223 Rem | 5.56 NATO, action: Semi-Auto, capacity: 30+1. Scroll up for the full specification table before you commit.

Sig Sauer headlines the specification sheet for this platform. Factory chambered in 223 Rem | 5.56 NATO, built around a semi-auto action with a 30+1 round capacity to keep performance predictable from shot to shot. Dimensional notes call out a barrel length of 16" in and overall length measuring 33.25"-36.50" in, helping you plan cases and storage. Unloaded weight settles near 8 lbs, which influences recoil management and carry options. Furniture is trimmed in black finish, giving the rifle its classic profile. Metalwork wears a fnc treatment, pairing durability with period-correct styling.