So, I started filling out my eform 1 for my PSA glock lower, and stopped at the barrel length and overall length. I'm first trying to decide which size barrel to get, and I'm going to shoot for either 4.5 or 5.5. I'm leaning towards 4.5, but don't know of any pros/cons for 5.5 over the 4.5 inch. Also, unlike my 22 sbr, I'm going to do a shorty rail, that goes to the tip of the barrel, instead of the suppressor under the rail. I know there are 3 and 4 inch rails, so finding some isn't the issue.
So if this was going to be suppressed, which size barrel would I get the most benefit out of?
Also, what would the overall length be on the gun with a 4.5 or 5.5 inch barrel with a magpul MOE stock?
I'm thinking the length on a 9mm 4.5in would be the same as my 4.5in AR 22 SBR, because of the lack of a barrel extension.