[wetwrks]

It uses an AR style grip. As long as the gun is legal where you are there shouldn't be anything restricting you from replacing the grip on it. I replaced mine.

 

[AGFNTB]

Since I live in CA (I know, I know), I had to make my MPX carbine featureless or register it as an "assault weapon". I replace the Sig grip with a Magpul MIAD and added an Exile Machine Backfin to make it not have a "pistol grip" (an evil feature in CA).

 

[COBE]

I added:
1) HexMag Advanced Tactical Grip …..PolyHex2 Composite, with three-angle adjustments to choose from…comes in Black and FDE (about $28).

2) Arisaka Defense Vertical Grip for KeyMod handguards. Has a radiused profile at the top which tapers to meet the handguard mounting surface for low-profile feel. (Height: 2.50", Width: 1.30", Weight: 1.8 oz). Grip is CNC machined from 6061-T6 aluminum and MIL-A-8625 Type III hard coat anodized ($30)

 

[austinite]

I have read that there are problems because the MPX has two springs as opposed to the standard one spring. Can I use a Magpul MIAD or is this a big deal to tuck the other spring into a place it isn't supposed to go?

 

[lcarlos]

I have read that there are problems because the MPX has two springs as opposed to the standard one spring. Can I use a Magpul MIAD or is this a big deal to tuck the other spring into a place it isn't supposed to go?

My MPX had the 2 springs but the grip only had one hole, it was tricky trying to keep the 2nd spring straight while I put the replacement grip on but it basically just compresses down. Haven't had an issue so far.

 

[RangeRat]

I replaced my grip with a Magpul Moe+. The trick to keep the second spring form bending is to push the grip forward then straight up.

 

[BigBlockBobby]

I'm running a BCM mod 3 grip on both of my mpx's