Home Forums Hunting & Shooting Handguns Magazine extension question.

If I put +2 GOP extension on 10 round G26 magazine do I need different spring or can I use original 10 round magazine spring? Thanks.

I got one of those mags for converting my 27 into a 26. I bought it from GT Distributors. I don’t think it has a different spring.

I don't have a specific answer for a Grock but here's what I can tells you works fine for an analogous handgun. I have four sizes of mags:
Factory 15 rounds
Factory 17 (15 w/ a +2)
Factory 19 (longer grip model mag)
Extended 20 (15 w/ a +5)

The first two use a 12 loop spring. The second two use a 13 loop spring.

So I would just go with the original spring and see how it works.

I used the Pearce +2 on my G26 and didn’t have to change springs. Pistol has functioned flawlessly for 6+ years.

Thanks. I used small vice with padded jaws to help in replacing Glock base with + base plate. I noticed that the new plate can not be fully inserted to seat the spring cup. The cup can be easily seated with plate inserted about 3/4 ways in. After correct seating the plate can be fully pushed back to back edge of magazine tube.