P99C Mag question: Full-size with Grip ext sleeve or Compact Mag with Pinkie Ext.

2069 Views 12 Replies 11 Participants Last post by olstyn, Aug 23, 2018

AnthonyC

Discussion Starter · Aug 22, 2018

I am a new P99C 9mm owner from NY and I am trying to build up a decent supply of magazines. I have just bought several with 10-round magazines with the finger extensions. These do allow me to wrap all my fingers on the grip of the gun.

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However, I was wondering if the full size magazine with a grip extension sleeve offers any benefit over these. It would NOT offer any increase in capacity for me as I live in NY.

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I was just wondering if it was better shooting-wise, maybe because the meat of the hand/palm to come in contact with more of the longer grip or it would be easier to grip with the support hand, etc.
Just curious about others' experience regarding the comparison.
Thanks!

PS. I am still trying to figure out how to have my attachments show up in the post as the actual image rather than a link.

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balance

· #2 · Aug 22, 2018

Personally, I would much prefer to use the 10rd mags that came with the pistol. They were designed specifically for that pistol. The spring rates in the pistol are all in a balance, and I'd much prefer to use what the designers specifically made for that pistol.

Also, in a few different designs, "neutered" 10rd mags are known to not be as reliable as the standard capacity mags for the same pistols. Glock comes immediately to mind. Manufacturers make firearms to win agency contracts. No government agencies that I know of are limited to using 10rd mags. All of them that I know of use the standard capacity mags, and that mag design is what the designers made specifically for use in that pistol. 10rd mags are an afterthought, only necessary in a certain few states and cities, and it wouldn't surprise me at all if I found out that the 10rd mags are not as well tested as the standard capacity mags.

I see no reason to go with a grip sleeve and a longer mag, if you can get a full grip on the factory 10rd mag with a pinky extension. Personally, I would go the pinky extension route.

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muckaleewarrior71

· #3 · Aug 22, 2018

I have a P99c and I would not go with full size mags just for the grip staying at 10 rds. The flush and pinky 10 rd mags do just fine plus there is very slight play with the grip sleeves in my experience.

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UniversalExports

· #4 · Aug 22, 2018

Since all your fingers are getting full purchase on the P99c grip when using the compact magazine with pinky extension, and since you'll gain no advantage in capacity going with the P99 full-size grip with sleeve, there is absolutely no advantage to going with the latter. Indeed, the latter option negates the concealability of the weapon.

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AnthonyC

Discussion Starter · #5 · Aug 22, 2018

Thanks for everyone's feedback. It sounds like the full size mag doesn't offer much benefit. Like I said, I have several with the pinkie extension so I can get all my fingers on it.

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muckaleewarrior71

· #6 · Aug 22, 2018

The full mags with grip sleeve are very useful if you are using 15 or 17 round mags (if allowed - SMH). I keep two 15 rd mags with a grip sleeve on them for my P99c. One is my spare mag and the other is for home defense mode and/or when I'm traveling to my early morning part time job at 4 am. I will carry it 15 +1 at times during the cooler months too when I'm wearing jackets and such.

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ShipWreck

· #7 · Aug 22, 2018

When I had a P99c years ago, I had the grip extension for the fullsize mags (I also had a fullsize P99). I did not care for it much. Some edge on it somewhere bugged my hands when I shot with it. I preferred to use the fullsize mag without the grip extension cover, personally.

But, the normal P99c mags with that finger rest is preferable, personally. I'd keep what ya have if it were me

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christak

· #8 · Aug 22, 2018

I have multiple 10 round mags with and without the pinkie extensions as well as 3 15-round mags with grip extensions. I like the added capacity provided by the 15-round mags along with the longer grip, BUT if I didn't get the added capacity I would just stick with the 10-round mags with the pinkie extension. They offer a good purchase without unnecessary bulk (when capacity cannot exceed 10 rounds).

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imaoldfart

· #9 · Aug 22, 2018

I Use 12 round mags.

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Holzauge

· #10 · Aug 23, 2018

AnthonyC said:
Thanks for everyone's feedback. It sounds like the full size mag doesn't offer much benefit. Like I said, I have several with the pinkie extension so I can get all my fingers on it.

More grip is really the only benefit you'd get from it. My take on the 10 rounder with the finger extension is that it'd be great if it was "just" a little bit longer. Here's where I think H&K has really been innovative; they make a good selection of compact mags for their handguns, plenty of grip room, with capacity options, too. Oh Walther... I'd love to see a 13 rounder for the 99C with more grip at the base!
The full size mag with the sleeve is a little "rattley," but I've never had any problems shooting with either one. Stay with the 10.

Don

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Guevera

· #11 · Aug 23, 2018

I have both and far prefer the 10-round magazine with the finger extension. By the time I put the full-size magazine on the C, I may as well have the full-size pistol.

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1stnamebassist

· #12 · Aug 23, 2018

I have both size magazines. I find I Shoot equally well with either one, but normally carry the 15 rd with grip sleeve. I would not bother with a longer 10 rd with a grip sleeve.

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olstyn

· #13 · Aug 23, 2018

You may not see a significant accuracy benefit at "common" self-defense distances, but I'd be shocked if your draw and splits (while maintaining accuracy) weren't measurably faster with the grip extension sleeve/full size mag. Of course, that doesn't negate the need to be careful not to pinch yourself on reloads with the compact.

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