We 416 (m4 sol) Upgrades include: -licensed hk 416 stock -trinity force ambi extended charging handle latch - ra tech npas adjustable fps system (depending on barrel diameter and length you can get from 200-550 fps but you'll need a tightbore to get that high) - ra tech autobot hopup bucking I've taken very very good care of this weapon but I'm in need of some cash. It's been cleaned and greased almost after every time I've used it. Always taken the best care of this gun so it's still in great shape. Kick feels awesome you'll love this gun. Will come with npas tool and I'll adjust the hop Up for .25s unless specified. I have more we gbb parts of you want for extra like a tightbore etc. if you want more mags you will also have to pay more (35 per mag and they are 40 plus shipping brand new online) PayPal ready! 340$ shipped Will ship with "federally mandated" orange flash hider, one gas mag, npas tool, stock grip, and no attachments seen in pictures besides iron sights.