AICS Long Action 5-Round Magazine — 300 Winchester Magnum, Accuracy International Chassis System Compatible
SKU: 100005889 • Caliber: 300 Winchester Magnum • Action Length: Long Action • Pattern: AICS (Accuracy International Chassis System) • Capacity: 5 Rounds
Feed your long-range hunting or precision rifle with a magazine trusted by competitors and professionals worldwide. The AICS Long Action 5-Round Magazine (300 Win Mag) delivers reliable cartridge presentation and rugged durability for rifles using the Accuracy International Chassis System or other AICS-compatible long-action bottom metals. Purpose-built for magnum-length cartridges, this 5-round AICS mag seats smoothly, feeds consistently, and shrugs off hard use in the field, on the clock, and at the range.
Why This AICS 300 Win Mag Magazine Stands Out
Proven AICS Geometry: The industry benchmark for controlled, repeatable magnum feeding in precision bolt rifles.
Long-Action, Magnum-Ready: Internal dimensions tuned for .300 Winchester Magnum and similar magnum-class OALs.
5-Round Capacity: Ideal for hunting regs and prone stability; low-profile design reduces snagging in brush and on bags.
Rugged Metal Construction: Stiff, corrosion-resistant body with reinforced feed lips maintains geometry after drops and hard field use.
Anti-Tilt Follower & Strong Spring: Keeps the stack aligned and ensures positive last-round feeding in dirty or cold conditions.
Smooth Lockup & Drop-Free: Consistent insertion and release in clean, in-spec AICS mag wells for faster reloads and quick administrative handling.
Key Features & Specs
Caliber: 300 Winchester Magnum
Platform: Long Action bolt guns using AICS-pattern chassis or detachable bottom metal
Capacity: 5 rounds
Body: Heavy-duty metal with protective finish (color typically black or dark gray)
Follower: Anti-tilt for reliable presentation
Spring: Tempered steel spring for consistent pressure across temps
Floorplate: Robust base for easy maintenance and long-term durability
SKU: 100005889
Compatibility: AICS-cut mag wells from leading brands (see below)
Compatibility (Common Examples)
Chassis/Stocks: Accuracy International, MDT (ESS/ACC/HS3/etc.), KRG, XLR, MPA, Seekins, and other AICS-cut long-action systems.
Bottom Metals: AICS-pattern DBMs for long-action receivers (e.g., Remington 700 LA footprint).
Not for AR-10/SR-25: This is a bolt-action AICS magazine—not compatible with AR-10/SR-25/LR-308 semi-auto patterns.
Fitment Tip: Seating depth and reliable feeding are affected by overall cartridge length (OAL), bullet profile, and throat. Handloaders running long bullets should verify internal length and clearance in their specific chassis/DBM.
Real-World Advantages
Field-Proven Reliability: Consistent feeding with magnum hunting loads when weather and terrain turn ugly.
Hunting-Friendly Form Factor: 5-round capacity keeps the rifle trim and bag-friendly for prone shots and tight blinds.
Match-Ready Toughness: Feed lips hold geometry through repeated drops and barricade work; wipe clean and keep shooting.
Confidence at Distance: Repeatable stack height and presentation help preserve the rifle’s rhythm for faster, more reliable follow-up shots.
Ideal Use Cases
Big-Game Hunting: Low-profile 5-rd capacity meets many hunting requirements while minimizing bulk.
Long-Range Training: Practice reliable reloads and malf drills with a mag that mirrors real field conditions.
Precision Competition: A dependable spare for stages that allow mag changes with magnum bolt guns.
Maintenance & Care
Basic Clean: Remove floorplate, follower, and spring; wipe internal walls to clear dust and grit.
Run Dry (or Nearly): Use a dry lube sparingly; avoid heavy oils that collect debris.
Inspect Feed Lips: Check for bends after impacts; lightly correct minor deviations to restore geometry.
Monitor Spring Health: Replace if you notice sluggish top rounds or inconsistent last-round pickup.
Frequently Asked Questions
Q: Will this magazine work in my Remington 700 long action?
A: Yes—if your rifle uses an AICS-pattern long-action bottom metal or chassis. Hinged-floorplate stocks require a DBM conversion.
Q: Can I use other long-action calibers (e.g., .300 PRC, .30-06)?
A: This SKU is tuned for .300 Win Mag. Some similar OAL cartridges may function, but verify internal length, feed-lip profile, and follower compatibility for your specific caliber and load.
Q: Is the follower polymer or metal?
A: The design uses an anti-tilt follower engineered for smooth stack movement; materials vary by manufacturer/spec—function is the priority.
Q: Will it seat on a closed bolt when full?
A: Many systems allow it with proper technique. Practice with your rifle to confirm closed-bolt seating with a full 5-round load.
Q: Does it come pre-lubed?
A: Most precision shooters prefer mags to run clean and mostly dry. Wipe down before first use and add only a trace of dry lube if needed.
SEO Highlights (Quick Scan)
AICS 300 Win Mag Magazine — Long Action, 5-round, AICS-pattern for bolt-action precision rifles
Rugged metal body, anti-tilt follower, reliable magnum feeding in harsh conditions
Compatible with Accuracy International Chassis System and AICS-cut long-action bottom metals
Ideal for big-game hunting, long-range training, and precision competition
SKU 100005889 — dependable 300 Winchester Magnum magazine for AICS-standard rifles
Equip your magnum rifle with the AICS Long Action 5-Round Magazine (100005889) and get dependable feeding, rugged construction, and universal AICS compatibility—so your focus stays on the wind call, not the next round.
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