Why does the SP6920 & 40 come with 20 round mags?
Problem with the 30’s ?
I don’t know, but it’s certainly not a “problem with the 30’s”
Due to the advantages of the 20 round magazine over the 30 round magazines in LE use…
B
Probably so they can sell them in states like Maryland that don’t allow 30 round mags. You can possess them in Maryland, but can’t, among other things, buy them in Maryland.
What do you mean?
Do tell.
What are the advantages in LE use? Because I’d rather have 30 in the gun and I’m LE.
When I’m in and out of vehicles, I’d much rather have a twenty rounder in the gun than a thirty rounder as it is less apt to get hung up on something in the vehicle.
For the simple reason it’s cheaper to provide two twenty round magazines instead of two thirty round magazines for the price point.
I haven’t had the 30 round mag get in the way when I’m in and out of the car, the barrel is usually what annoys me (16"). I do prefer 20 rounders for prone though, since it lets me to get much lower.
It may have to do with this-
Here In VA, anything over 20 rds is considered an assault rifle, and has stricter BGC guidelines and permits
20 rounders are better for shooting prone or off a bench, but my new 6920SOCOM came with two thirty rounders.
For the win.
What?
IN VIRGINIA?
I prefer a 30 round magazine for prone
You probably wouldn’t on a two way range 
maybe so, Isn’t using a 30 round mag as a rest against the ground an accepted and instructed method? Doing so gives you a third point of contact. I could be wrong, please learn me
by the way I realize I have strayed from the original question the OP asked, I can start another thread if needed
I think its a good technique for extra stability, but I just don’t like how it props my head up more in the line of fire. However, I generally keep a 30 round mag loaded and a 20 round mag on my person. If time permits I would switch to the 20 in prone, if not, I would use the technique you stated.
We did drift off the original topic, but I guess that is the point of a discussion forum sometimes?
I don’t know why Colt provides two 20’s vs two 30’s, but I am kind of glad they do since I really like the Colt 20 round mags!
After that guy shot up the CIA employees outside of Langley, they passed a feel-good law in VA restricting certain “assault” firearms to citizens and legal permanent residents. For firearms that meed the definition* you need to prove citizenship or legal residency at the time of purchase, and carrying such firearm loaded requires a CHP (so things like a USP Tactical with a threaded barrel, you’d need a Concealed Handgun Permit even to open carry it).
*An assault firearm is defined as any semi-automatic center-fire rifle or pistol that expels single or multiple projectiles by action of an explosion of a combustible material and is equipped at the time of offence with a magazine which will hold more than 20 rounds of ammunition or designed by the manufacturer to accommodate a silencer or equipped with a folding stock.