BudsGunShop.com - is this still legal in Connecticut

This model you're asking about is unfortunately not CT legal. Ed C. Listed the reasons below. Here's the model you can get for CT.
budsgunshop.com/product_info.php/products_id/5258/smith+%26+wesson+m%26p+15-22+sport+ct+md+nj+compliant

Hi Jainarine and welcome. No, it is not CT compliant as configured. Cheers and stay safe!

Jainarine, unfortunately no. Prohibited - .22 Rimfire rifles that are semi-auto with ability to accept detachable magazines and any two
of the following features:
1. Pistol grip
2. Folding / telescoping stock
3. Bayonet mount
4. Flash suppressor
5. Threaded barrel
.
1, 2, 4, & 5 are the 'evil' features that disqualify this gun.
.
CT complaint model here budsgunshop.com/product_info.php/products_id/5258/smith+%26+wesson+m%26p+15-22+sport+ct+md+nj+compliant ,
.
Stay safe & have a great day!