Didn't you just answer your own question? :?
What does Springfield mean when they say
The GAP round will fit in the 9 and .40 frame?
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45 GAP - 4 inch & 5 inch Models
How do you give the XD big-bore stopping power without enlarging its trim, ergonomic frame? Simple you just make the cartridge shorter so it fits in the existing XD platform.
Introducing the new XD chambered in 45 GAP. This new cartridge gives you the same performance of the mighty 45 ACP, but the shorter overall cartridge length of the GAP round means it fits in the exact same XD frame as our 9mm and 40 S&W versions.
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45 GAP - 4 inch & 5 inch Models
How do you give the XD big-bore stopping power without enlarging its trim, ergonomic frame? Simple you just make the cartridge shorter so it fits in the existing XD platform.
Introducing the new XD chambered in 45 GAP. This new cartridge gives you the same performance of the mighty 45 ACP, but the shorter overall cartridge length of the GAP round means it fits in the exact same XD frame as our 9mm and 40 S&W versions.
[/i]
1 - 15 of 15 Posts
![[TASF]Overkill](/d1/avatars/s/2/2505.jpg?1156032827){kind=avatar}
I am guessing it's a little lighter since there is less metal to accomodate for the bigger round. 
Reposted from http://www.hs2000talk.com/viewtopic.php?t=16839&p=153468
Because the 45 GAP casing is shorter in length than a 45 ACP, guns designed around the 9mm and 40SW needn't be modified to fire the cartridge.
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Comparison: The .45 GAP (top) side-by-side with the S&W .40 Glock 22
along with .40 S&W, .45 GAP, and .45 ACP cartridges.
"The case length of the .45 G.A.P. is 0.76" as opposed to 0.89" for the .45 ACP. In metrics, this translates to 19mm vs. 22mm. By contrast, the .40 auto case measures 0.85", or 21.5mm in length. With its 200-grain JHP bullet, the overall length (OAL) of the.45 G.A.P. cartridge is 1.08", slightly shorter than either the 9mm or the .40 auto in most of its loadings. "
taken from: http://www.military.com/soldiertech/0,14632,Soldiertech_Glock37,,00.html
The 45 GAP XD is even mentioned in the lower portion of the article with positive remarks from the author.
-hype
Because the 45 GAP casing is shorter in length than a 45 ACP, guns designed around the 9mm and 40SW needn't be modified to fire the cartridge.
Comparison: The .45 GAP (top) side-by-side with the S&W .40 Glock 22
along with .40 S&W, .45 GAP, and .45 ACP cartridges.
"The case length of the .45 G.A.P. is 0.76" as opposed to 0.89" for the .45 ACP. In metrics, this translates to 19mm vs. 22mm. By contrast, the .40 auto case measures 0.85", or 21.5mm in length. With its 200-grain JHP bullet, the overall length (OAL) of the.45 G.A.P. cartridge is 1.08", slightly shorter than either the 9mm or the .40 auto in most of its loadings. "
taken from: http://www.military.com/soldiertech/0,14632,Soldiertech_Glock37,,00.html
The 45 GAP XD is even mentioned in the lower portion of the article with positive remarks from the author.
-hype
1 - 15 of 15 Posts
