Troy posted this on the old board:

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10/22 Mag FAQ
10/22 magazines vary in design, materials, capacity, and of course cost. As this is an extremely inexpensive and popular rifle, there was a wide range of high-capacity (more than 10 round) magazines designed for it. Below are the most common types, from best to worst:
CMF Products/Mitchell Arms "Teardrop"
These 50-round capacity magazines have steel feedlips and are a vertically-straight teardrop shape. These mags are unique in their use of a rotary belt, like a tank track, to hold and feed the rounds. They have a removable cover than contains a handle that connects to the spring-loaded lower gear, allowing the gear to be rotated and the mag loaded. These magazines also feature a belt clip, and are made from similar plastic as the stock Ruger magazine.
Butler Creek "Steel Lips"
Like virtually all hi-cap 10/22 mags, the Butler Creek mags are "banana-shaped" and use flat-wound "constant force" springs. Butler Creek used both clear and smoke-colored transparent plastic for the mag bodies, and each mag has a male and female socket to allow a second mag to be connected "jungle style." These are straight-feed, single stack mags, and have steel feed lips imbedded in the tough but brittle molded plastic mag bodes. They hold 25 rounds. [Butler Creek also makes post-ban 10-round Steel Lips.]
Condor
Condor mags are extremely similar to the Butler Creek mags, except that the mag body is opaque black plastic. Condor mags are also banana-shaped, single-stack, straight-feed, 25-round capacity mags with steel feed lips and constant-force springs. The sockets will allow Butler Creek and Condor mags to be connected together.

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Butler Creek "Hot Lips"
Hot Lips mags are probably the most popular of the 10/22 hi-caps, and were produced in vast quantities. They are identical to the "Steel Lips", except the substitution of a soft red plastic in place of the steel feed lips. The plastic lips flex a bit, allowing the mags to be quickly loaded with an optional speedloader, a popular option. These mags were also less expensive than the Steel Lips when new. [Butler Creek also makes post-ban 10-round Hot Lips.]
Ramline (25, 30, & 50-Round Capacities)
Ramline (a subdivision of Blount, owners of Speer and CCI) mags are visually very similar to Butler Creek mags. They use the familiar banana shape, the same constant-force springs, and have smoke-colored transparent plastic bodies. The 25 and 30-round versions are single-stack, and the 50-round mags are double-stack. They have sockets to allow mags to be connected to each other, but their size and location do not make them compatible with other brands. The biggest criticism of Ramline mags is that they do not use a separate material for the feed lips. Instead, the same strong but brittle plastic used in the mag body is also used for the feed lips and the locking lugs that hold the mag in place. While an appropriate plastic for the thicker mag bodies, it does not hold up well in thinner form, as required by the feed lips. After a modest amount of use, the feedlips will develop cracks, and eventually break off, rendering the magazine useless. It is also common for the rear locking lug (a small round nipple) to break off, preventing the mag from being held in place. Blount used to replace these mags under their lifetime warranty, but they are now out of stock, and can only replace them with a number of 10-round mags. A thumb-button speed loader was available as an option for Ramline mags.
Eagle Industries
Eagle mags are virtually identical to Ramline mags, except they are made from a brownish-yellow transparent plastic. Like the Ramline mags, Eagle mags use the same brittle plastic for the feed lips, causing the feed lips to eventually crack and break. Eagle mags are single-stack with a 25-round capacity.
-Troy
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Hope this helps...

Quoted:  A bitch to breakdown

Why would you break it down?