MPA Pro Chassis - Cheekpiece Removal

[rijndael]

One complaint I have with my MPA Pro chassis is that the cheekpiece is too slow to remove. I don't want to spin the detent/thumb wheel for dozens of clicks, and potentially undo the set screws. I like using the set screws in the cheekpice and buttplate because it removes that slight amount of wobble. Yes, I know MPA has a quick detatch cheekpiece, but this is a free (or ~$5) fix. If you have any old computers around, you may already have the thumb screws on an old case side panel.

One quick fix was to put (aluminum) thumb screws in for the set screws and then to move the thumb wheel to the top of the stock. This lets me loosen the thumb screws and lift off cheekpiece, and since I'm not spinning the wheel, it acts like a depth stop for making sure it's in the same spot every time.

I know a lot of you guys aren't chassis folk, but I hope someone gets an idea from it.

 

[DaWhit]

Where did you get the thumb screws?

 

[rijndael]

If you need to buy some, something like this will work:

8-32 x 3/8" Knurled Thumb Screw (10 Pieces) Aluminum Black Anodized Finish | eBay

Finish: Black Anodize. Holding point for anodize process leaves slight finish void on thread. 8-32 x 3/8" Knurled Thumb Screw, Aluminum - Black Anodized. This part is precision machined from High Quality Aluminum and then Black Anodized with a quality finish.

www.ebay.com

They'll be a hair long, but totally fine, for the cheek piece and perfect for the butt plate. They're aluminum, so trimming would be easy if you're inclined.

 

[stevieb92]

Great idea! Do you notice the thumb screws hanging up on any clothing or parts of your body? I use my Matrix Pro in PRS competitions and that would be my concern with the thumb screw hanging out from the side like that.

 

[rijndael]

Great idea! Do you notice the thumb screws hanging up on any clothing or parts of your body? I use my Matrix Pro in PRS competitions and that would be my concern with the thumb screw hanging out from the side like that.

No, but if they do, I'll just trim the head thickness down a bit and/or round over the corners. I've never had an issue with my ACC hanging up and it has thumb screws too.

 

[stevieb92]

Awesome! Thanks!