Anyone got a good lead on standard-capacity mags? Also, AR-10 PMAGS will fit 6.5 Creedmoor yeah? And how big is too big for prone bipod shooting?

https://dahlonegaarmory.com/product/cz-91531-p-10-c-9mm-double-151#product_detail

$381.51 CZ P-10 C (add to cart to see actual price)

$50 rebate available and terms

Comes with two mags

https://palmettostatearmory.com/psa-dagger-compact-9mm-rmr-threaded-barrel-pistol-w-10-pmag-27rd-15rd-magazines-psa-pistol-bag.html

$399.99 PSA Dagger - Optics Ready, Threaded Barrel.

Picture suggests it comes with 5 each of 15 round mags and 27 rounds mags. 27 round mags are pretty much only useful for wasting ammo at the range, but some people like them.

PSA Dagger isn’t a bad option if you want a Glock form factor and (most of) Glock’s aftermarket without paying Glock price. If you don’t care about the optics cut you may be better off finding a used Glock19 for ~$500.

https://www.smga.com/smith-and-wesson/sw-mp15-optic-ready-556-nato-rifle-67 or https://www.smga.com/smith-and-wesson/mp-15-sport-ii-or-mlok-9675

$499.99 S&W M&P15 Sport AR-15. Probably better ARs to be had in the 700-800 range, but his is usually considered to be a solid entry-level AR-15.

Comes with 5 free hex mags plus a pmag. Don’t know anything about the quality of the hex mags. 5 mag deal is out of stock.

You’ll need to purchase some sort of optics or iron sights.