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243 Posts
NO !!!!!
Official Ruleboook Pg 20
EXCLUDED Modifications{NON-Inclusive list}:
1.Externally visible modifications other than grips or sights.
2.Robar style grip reduction.
3.Add-on magazines well opening.
4.Guide rods made of a material different from the factory part it replaces.
5.Seattle Slug Grip Plug and similar weighted products.
6.A barrel of another caliber thet is not offered in the original
factory model.
7.Slide lightening(see "slide, lightening" in glossary for
futher information)
8.Checkering and stippling.
9.Refer to Appendix ONE-A. Firearms-Non-IDPA-Legal Modifications.

597 Posts
It depends on the division, ESP and CDP the answer would be it all depends SSP is a flat no.

BTW, here’s a response that I received from IDPA headquarters regarding Seattle Slugs and Magazine Wells

From: Robert Ray [mailto:[email protected]]
Sent: Tuesday, October 25, 2005 7:28 AM
To: 'Ryucasta'
Subject: RE: Equipment Question

To your first question the answer is yes, you can use the aluminum slug for ESP and CDP.

As to your second question, there is not a specified weight for mag wells. The aluminum or the plastic one will be alright. The two things to be aware of when looking at when adding something like that is

a) does it go over weight limit for that division

b) does it still fit in an IDPA box.

When looking at after market parts a good way to tell if it is not legal is to ask yourself, Is this part designed first to add extra weight then provide a function (as in a brass mag well)? If the answer is yes you could be in trouble. <g>

I hope this answers your question. Please let me now if I can be of any further assistance.

Robert Ray

International Defensive Pistol Association


-----Original Message-----
From: [mailto:[email protected]]
Sent: Monday, October 24, 2005 10:41 PM
To: [email protected]
Subject: RE: Equipment Question


Thanks for the quick response mea culpa though for not being more specific in my question. Currently the Seattle slug is made from both Aluminum and Brass. Based on the information provided on the Taylor Freelance website it states that the Aluminum version weighs 1.1 oz and the Brass version weighs in at 3.5 oz. Can the Aluminum Seattle Slug be used in either ESP or CDP Divisions?

One more question since ESP (Page 22 Item 13) and CDP (Page 24 Item 12) allow add on well extensions what is the maximum weight allowed for these extensions that are not made from brass. Can they be made from Aluminum or do they need to be made of some sort of plastic (I.e. Glock JP Enterprise Aluminum or California Competition Works Delrina) to be legal for either division?

I am also aware that there is a total weight limit for the firearms that are associated to each of these respective divisions (43 oz ESP and 41 oz CDP).
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