Heckler & Koch has a new Translucent 30 Round Magazine for AR15 platforms. These are available directly from the HK website at a very un-HK like price of $19.95.

HK 30 Round Polymer Magazine

Fits HK MR556A1, HK416, and all high quality AR/M4/M16 type firearms.

Heckler & Koch reliability and durability in a 30 round 5.56 mm Polymer Magazine at a special price. Designed to provide optimal ammunition feeding for any M16/M4/AR15-type weapon, the HK 30-Round Polymer Magazine can be used in any firearm that uses a NATO-standard 5.56 mm magazine. The HK 30 Round Polymer Magazine is drop, crush, and impact resistant and features an anti-tilt follower as well as HK proprietary geometry and design features for exceptional performance.

Specifications:

Same high strength, lightweight polymer used on combat proven HK's G36 and HK417 magazines
Corrosion resistant
Low profile base plate
Fits existing magazine pouches and magazine carriers
Anti-tilt follower
Translucent body serves as an immediate loading indication
Advanced spring
Reinforcing ribs for added strength
High quality polymer materials
Non-reflexive body and low IR signature
Low maintenance, disassembles without tools
High and low temperature environmentally tested
Width: 2.7 inches (69,8 mm)
Height: 7.5 inches (190 mm)
Weight (empty): .2 lb. ( 124 g)

MSRP $19.95