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Reshaping Magazine Feed Lips


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#1 Zoo

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Posted 13 October 2003 - 12:43 PM

Since I don't have access to a magazine anzil- How would one reshape the feed lips/ramps on a magazine? One of my mags is far enough out of shape that the rounds will not slide out the front.
Thanks!
Jeremy
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#2 deerslayer

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Posted 13 October 2003 - 06:14 PM

Does someone (maybe PK) have a magazine anvil? I've got a few magazines that look pretty bent up on the feed lips that I'd be happy to have someone work on.
Dan

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#3 Chopper28

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Posted 13 October 2003 - 07:44 PM

Glen Whitinberger makes and sells mag anvils. I am sure someone on this board has his email address.
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#4 Kevin

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Posted 13 October 2003 - 07:58 PM

Glen's mag anvil works very well. I also made one for myself (works good) but it cost alot more than Glen's.
I made a tool that sides into the front of the mag so that the feed lips can be shaped all the way to the front of the mag. Any tool that only comes up through the mag will not be able to completly shape the lips.
I am not slamming Glen's mag anvil, it' well worth the price. Your Thompson may be less sensitive to mag imperfections than mine.
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#5 Ron A

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Posted 13 October 2003 - 08:45 PM

I would be interested in Glen's address also - I would like to purchase an anvil
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#6 Chopper28

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Posted 13 October 2003 - 11:36 PM

Here it is,
Glen Whittenberger
5540 Wright Dr.
Troy, MI 4808 email: GlenHWhittenberg@al.com

Price for anvil is $50.00
He also has other TSMG suff.
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#7 PK.

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Posted 14 October 2003 - 07:08 AM

Magazines are, of course, a critical component of the feed cycle any automatic firearm. When re-forming or straightening feed lips you need to insure the gap at the top opening is the correct radius (.22), width (.55-.56), and is centered on the body and that the distance from the top of the magazine to the edge of the catch hole is correct (2.303). The latter is more difficult to check without a gauging set up of some kind.

Whenever a gun comes to me for service, I always suggest that the customer send any magazines he intends to use for gauging and adjusting. It is never fun to send out a proper gun only to have it hang up because of a faulty magazine.

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#8 Zoo

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Posted 14 October 2003 - 03:15 PM

Thank-you guys,
This information does help.
Jeremy
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#9 Ron A

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Posted 14 October 2003 - 07:16 PM

PK - are you making any type of gage or jig for setting the feed lips? Are do such devices even work?
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#10 PK.

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Posted 14 October 2003 - 08:55 PM

The measurements can be gotten from the prints and most of the feed lip configurations can be checked with “normal” measuring tools and common sense and skill. The relationship of the lips to the mag catch hole can not be measured accurately with out a fixture, gage or set up . I am not aware of such for sale; I use a set up on the surface plate and height gage.

One must be careful adjusting the lips as this can have a dramatic effect on the relationship of the mag catch hole to the radii that position the cartridges in the magazine (measured from the top of the magazine to edge of the catch hole). If this distance and radii are not correct, performance will obviously suffer.

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