We have a Once fired, zero issues, Beta C mag for the Heckler Koch 5.56mm rifles. I ran one mag thru our D. Sample HK53 and it ran perfect!
This one has the early Metal mag tower, not plastic :-)
You will get all that is pictured, and there is a Mag Loader marked HK 5.56mm
$250 is a Priority Mail shipped price and you will get a tracking number. PayPal (gift only) is preferred but will accept a check. Contact info is just below the Pics.
From Beta: The BETA MAG is a revolutionary twin-drum high-capacity magazine for 5.56mm, 9mm and 7.62mm rifles, light support and other specialized weapons. BETA MAG™ has a 60,000-round service life, "stores indefinitely while loaded without performance loss" and requires no maintenance other than cleaning and lubrication.