The FAB Defense FX-UMAG30 is a 30-round polymer magazine designed for M16, M4, and AR-15 variants chambered in 5.56×45 NATO or .223 Remington. Translucent windows on both sides and an indicative follower provide visual round-count identification from 10 to 30.

Its reinforced polymer construction, textured gripping surface, extended floorplate, and low-friction follower support practical handling and reliable magazine function.

Key Specifications

• The magazine holds 30 rounds of compatible ammunition.
• The listed chambering is 5.56×45 NATO and .223 Remington.
• The magazine is compatible with M16, M4, and AR-15 variants.
• The body uses reinforced polymer construction designed for impact and crush resistance.
• Translucent windows on both sides support visual round-count identification.
• The magazine features a stainless steel cataphoresis-coated spring for corrosion protection.
• The follower has a low-friction design and over-travel protection stops.
• The magazine includes an extended floorplate for handling with gloves and gear.
• The magazine can be disassembled by hand without tools.
• The listed product weight is 0.39; the source data does not specify a unit.

The FX-UMAG30 combines visible round-count windows with a durable polymer body, practical handling features, and compatibility with common 5.56×45 NATO and .223 Remington rifle platforms.