Whoops - I meant 108299. Sorry.
I bought it 1/13 and could not get the "cap" or recoil spring plug to fit as it was way too big.
After several emails and calls to customer service I finally recd. the proper part in April, but it was too big (in diameter) also and would not fit.
So I went to the dealer who found a plug out of a Kimber that fit and the oversized S&W plug fit the Kimber.
It is shorter than the S&W but works just fine.
What a time I've had!