From IPSC App. D4a #19.4:
Aftermarket springs are permitted, provided they are in the same configuration as the original.
So ... if it's the same configuration as the original, OK. Otherwise, no.
@terrydoc
You're assuming a brass backstrap is allowable. I'm not convinced. Grip panels are one thing, but I'm unconvinced that the backstrap is part of a grip panel.
@Squirrel45
That's GREAT news! You're a year out an NO CANCER! Yeah, oncology gave me the same story on chemo and radiation. Of the two, radiation's a BITCH!
The good news is you're clean. Get ready for all the descriptions of your 'new normal.' Yeah, I'd like to have my 'old normal back too. But we're both still ALIVE!
Congratulations!!!
Actually, check the thread posted by @ChuckS and pinned to the rules discussions ...
He's documented it quite well. 2008 was our first independent rule set.
USPSA is a member region of IPSC and in our legal filings for our corporate name we have ALWAYS been listed as USPSA/IPSC. We formally went our own way with an independent set of rules (albiet rooted in and based on IPSC rules) in 2008.
Again ... Confuse and conflate the two sets of rules at your own risk!
Do not confuse USPSA rules with IPSC rules. Though in MANY respects they are the same, there can be (as in Production) substantial differences. Neither set of rules has authority over the other.
There's been significant discussion within IROA over the last year or so as to what constitutes "significant weight" with no discernable answer as yet.
Understood, @perttime. However, the context of my comment had to do with default start positions, not with rules dealing with increased/decreased safety angles.
From the IPSC Glossary, 12.5:
So ... By definition, facing downrange is anything forward of 90 degrees to the median intercept of the backstop (i.e., forward of the 180.) It's no tighter than under USPSA rules, in that respect.