Ruger 10/22 pistol grip?

[Jeff5347]

Good evening everyone. New to the forum so first I want to say hi and thanks for letting in the group. I have a stock Ruger 10/22 that I want to change out the body to something along the lines of the Gungner or ATI conversion

GUNGNER Chassis for Ruger 10/22

Give your Ruger 10/22 Modern look

gungnerinc.com

AR-22 Ruger® 10/22® GEN2 Kit | ATI Outdoors

Shop Ruger® 10/22® AR-22 Conversion Kit w/ TactLite GEN2 Stock & 6-Sided Forend at ATIoutdoors.com

www.atioutdoors.com

What I'm unsure of is the law and what can and can't be done in Massachusetts. First off am I able to change out the chassis for something along these lines? Also from what I've read the .22lr is exempt from the "assault weapon" labeling so would I be able to add a pistol grip and fixed stock to this conversion?
I have searched before posting this but came up empty. I appreciate any info or help anyone has. Thanks, Jeff

 

[mac1911]

Maura says exempt, written law says different...have fun.

 

[Chevy 2 65]