Sig Sauer

SIG SAUER Magpul MCX/M400 5.56 NATO 30-Round Magazine - Gen M3 PMAG - 8900004

MSRP: $29.99
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SKU:
8900004
UPC:
798681618088
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SIG SAUER PMAG 30 AR M4 Gen M3 223 Rem 5 56 NATO 30 Round 8900004 UPC 798681618088

Product Description

The SIG SAUER PMAG 30 AR/M4 Gen M3 5.56 NATO / .223 Rem 30-Round Magazine (8900004) is an authentic OEM factory-offered polymer magazine produced by Magpul specifically tailored for SIG SAUER rifle platforms including the SIG M400, SIG MCX, SIG MCX-SPEAR LT, and SIG516 series. Engineered to strict defense and law enforcement specifications, this 30-round magazine combines Magpul's proven Gen M3 structural enhancements with SIG SAUER factory distribution standards to ensure seamless feeding reliability across both commercial and duty applications.

Molded from next-generation impact- and crush-resistant polymer, the Gen M3 architecture features optimized feed geometry and an internal curve that eliminates binding when cycling heavy match or non-standard 5.56/.223 projectiles. The magazine utilizes a long-life stainless steel internal spring paired with a four-way anti-tilt polymer follower for zero-fail feeding during sustained rapid-fire operations.

Equipped with a slender, low-profile floorplate that maximizes pouch clearance in tactical chest rigs, an over-travel insertion stop lug on the spine, and an integrated paint pen dot matrix for easy inventory numbering, the SIG SAUER 8900004 magazine is optimized for standard AR-15 lowers as well as non-Mil-Spec magazine wells (such as HK 416, FN SCAR 16S, and British SA-80 platforms).

*Armorer Bench Notes & Real-World Staging Guidance:*

Fitment Matrix: Direct factory fitment for SIG M400, SIG MCX, SIG MCX-SPEAR, SIG MCX-SPEAR LT, SIG516, SIG516G2, SIG556, and standard Mil-Spec AR-15/M4/M16 receiver wells. Compatible with 5.56x45mm NATO and .223 Remington ammunition.

  1. Ensure the host firearm is completely clear, magazine removed, and chamber visually and physically verified empty.
  2. Load up to 30 rounds of 5.56x45mm NATO or .223 Remington ammunition into the magazine, pushing cartridges straight down until seated flush against the rear spine.
  3. Insert the magazine straight into the rifle magwell until the magazine catch locks with a firm, positive click. Verify seat by giving a light downward tug.
  4. To mark individual magazines for range identification, use a paint marker to fill in the grid matrix array molded into the lower side body panels.

Key Features

  • Official SIG SAUER OEM Catalog Item: SIG SKU 8900004 factory cataloged for SIG MCX, MCX-SPEAR LT, and M400 platforms.
  • Next-Gen Polymer Formulation: Superior resistance to severe impact drops, body compression, and thermal stress.
  • Gen M3 Geometry Optimization: Slimmer floorplate profile with over-travel stops for enhanced magwell compatibility across non-Mil-Spec lowers.
  • Four-Way Anti-Tilt Follower: Self-lubricating polymer follower prevents binding and nose-diving under high-round-count or dirty field conditions.
  • Paint Pen Dot Matrix Identification: Molded grid on lower body allows clean numeric coding for load differentiation and magazine rotation.

Product Specifications

  • Brand: SIG SAUER / Magpul
  • Model/Series: PMAG 30 AR/M4 Gen M3 (MCX/M400)
  • MPN / SKU: 8900004 / 8900004
  • UPC: 798681618088
  • Caliber: 5.56x45mm NATO / .223 Remington
  • Capacity: 30 Rounds
  • Firearm Compatibility: SIG M400, SIG MCX, SIG MCX-SPEAR LT, SIG516, SIG556, AR-15 / M4
  • Body Material: Impact-Resistant Polymer
  • Spring / Follower: Stainless Steel Spring / 4-Way Anti-Tilt Follower
  • Finish/Color: Black
  • Country of Origin: United States