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Just curious to know why the magazines for the USP 9mm Full size are polymer? I purchased a USP 9 compact and it has metal magazines. Doesn't appear to make any sense, but is there an explanation?
Just a comment for those that may not know... VP9 and VP40 mags are actually P30/P30L 9mm or .40 S&W mags... they did not create new mags just for the VP series... when I had my P30L in 9mm, I loved that flexibility.... I noticed the metal VP9 mags shifted and clunked making noise which was not consistent but did happen...
USPc is smaller and uses metal mags for all calibers...It has to do with the size of the grip. The USP series was designed on the 40. Polymer mags did not make the grip excessively large on the 40 or 9. When they scaled up to 45 polymer mags would make the grip too big. This consideration is the same for the other models.
I think HK also realized the importance of mag compatibility, i.e. Smaller guns accepting the mags of their larger offerings.HK at the beginning, full size polymer, compact metal mags, luckily they came to their senses and all the new offerings come with metal mags. Metal mags been thinner leave more room for rounds, if Glock had metal mags the mags could easily hold two or three more rounds, but I have been wrong before.
You say problem solved, but this was part of the original design. The thought being you don't drop a mag that still have rounds in it. But yeah, us 'mericans see it as a problem,,, and they fixed it for us.I have to clear a few cobwebs from my mind for this one, but if I remember right, the early Glock mags would "swell" when loaded to the point they would not drop free. This was addressed by adding metal liners to later versions of their magazine, which continues to this day. Problem solved.
I am not a USP owner, so maybe someone could address if that was or is an issue with the USP. I'd like to think that HK got it right the first time.
if you take the metal liners and the polymer case and replace the two with a metal magazine in the Glock's you'll have more internal room in the mag, no?I think HK also realized the importance of mag compatibility, i.e. Smaller guns accepting the mags of their larger offerings.
As for the Glock mags, the internal dimensions are maximized, so they are not going to get any additional rounds. They actually set themselves up good with their polymer magazines when the .40 came about. Because of the thickness, they were able to thin them out to allow for better staggering for the .40 round, thus giving 15 rounds. Guns like the Beretta 92 and Sig P226 did not have that option, so they were only able to get 12 in .40.
You can only make the magazines so wide (internally) before the rounds don't stagger, at which point they will jam and not feed. With the Glock, I believe they are at that maximum point or close too it in .40. What you are suggesting however, could likely add capacity to the .45 GAP pistols though. But in that case, why bother.if you take the metal liners and the polymer case and replace the two with a metal magazine in the Glock's you'll have more internal room in the mag, no?
HK at the beginning, full size polymer, compact metal mags, luckily they came to their senses and all the new offerings come with metal mags.
Hi! I don't know why the magazines are in polymer, but - it's my opinion - It's a mystake. We should not forget, the USP have a polymer frame. At the moment of shoot, the equilibre is very imported. With a metal magazine we have a metallic weight in plus! With a polymer magazine, we don't have this...Just curious to know why the magazines for the USP 9mm Full size are polymer? I purchased a USP 9 compact and it has metal magazines. Doesn't appear to make any sense, but is there an explanation?