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Discussion Starter #1
Anyone ever try adding some capacity to their mags via an extension? I slapped my Beretta 20 rounders into the P88 just to see how it looked, and I like how well they fit the pistol.


I was thinking of adding the Mecgar +2 or +3 base pads for the SIG, on the basis they actually fit.


I'd like to keep my original P88 mags, but wouldn't mind the extensions, even if some massaging is required.


Experiences?
 

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I didn't bother trying to modify factory mags because they're so precious, but it's a cinch to just cut a new mag catch hole in any Beretta 92 mag and presto chango, super-reliable P88 mag!

I imagine most Beretta 92 +2 kits would work though, if you really wanted to use factory mags. You would just have to make sure the baseplate is thin enough to allow full insertion; the lips on plastic base plates, the part that fits over the foot of the metal magazine body, might be too thick on some.

 

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The 20rd magazines marketed for the P99 would work in the full size P88 if the extended metal notch that prevents over-insertion in the P99 and P88C was removed.
^ Also that, however without the plastic bumper you'll have metal-on-metal contact which could mar the finish on the P88's frame at that one spot where the overinsertion stop is.
 

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Discussion Starter #5
You guys sure about the p99 mags working in a p88? I tried inserting my p99 mags into the p88 and it’s too wide?
 

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You guys sure about the p99 mags working in a p88? I tried inserting my p99 mags into the p88 and it’s too wide?
The early 16rd P99 magazines with the flat sides will slide into the magwells of the P88 and P88C but, being too short they will not lock into place.

(The 15rd P88 magazines will work in the P99 and P88C.)

The 20rd P99 magazines also have flat sides - a plastic peg in the metal notch can be removed so the magazines work in the P88C. The entire metal notch would need to be removed for the magazines to lock into place in the full size P88.
 

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You guys sure about the p99 mags working in a p88? I tried inserting my p99 mags into the p88 and it’s too wide?
Yep! But only the older slab-sided 16 round P99 mags, the new ribbed-side 15 round ones won't fit. Also the P99 mag is too short to fit all the way in a P88 full size frame, but it will fit and lock into a P88 Compact frame, as long as the baseplate of the mag is swapped from plastic to metal. The mag body is basically identical despite holding 2 more rounds! I put a CZ75 baseplate on this P99 mag for demonstration, clicks right in, activates the slide lock and everything.

Because they're longer, Beretta 92/M9 mags will fit in all 4 guns (P99, P88, P88 Compact, 92FS/M9) including the 30 rounders! They just need a new catch cutout.


P99 16 round slab side mag with CZ75 baseplate:



P88 Compact with P99 mag locked in:



P99 mag fits in, but will not lock in P88:



Airtronics surplus M9 mag, cut for P88 mag catch:



Fits and works perfectly:
 
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