If I purchase this and remove the barrel extesion and flash hider and have a muzzlebreak pinned or welded on is this NJ legal. Futher is it possible to keep the barrel extender? Sorry if I'm a complete newbie but this is my first build.

 

http://palmettostatearmory.com/index.php/m4-premium-16-cmv-chrome-lined-stripped-upper-without-bcg-or-charging-handle.html

Not sure you can remove the barrel extender and still be within the legal length. Might not even be possible to remove it, period. You can remove the flash hider and pin/weld a brake and you'll also have to mill down the bayo lug in order to make it legal.

So the extender is legal and all I need to do is mill the lug and pin the muzzlebreak? Thanks so much. I have it on order as they are so hard to find. I guess worse case scenario ill scrap the barrel and get bull

 

I just did my upper from Palmetto. It's a 16" barrel so you just unscrew the flash suppressor, pin your muzzle brake (I used an inexpensive DPMS Branson brake) and grind off the Bayonet lug. I used a Dremel to grind the lug and it took just a few minutes. I also drilled and pinned the brake myself. I used this http://m.homedepot.com/p/Irwin-8-32-Tap-Drill-Combo-Pack/100051220/

From Home Depot. Drill, tap, insert 8-32 set screw, weld and grind. Done and NJ legal

If you have any questions when you get the upper just message me your number and I'll do my best to walk you through it. It's really not that difficult.

Thank you very much I appreciate it. So far I'm waiting for this upper and the lower build kit both from PSA to be shipped. My bro has a custom charging handle so he is giving me his stock charging handle so all I really need now is to pick up my lower and and a bolt carrier group.

PSA has been shipping their uppers out pretty quickly (mine was shipped within a week) The LBK on the other hand you will probably be waiting at least 3 weeks. I have an order in with them from 1/30 that hasn't shipped yet. Lowers are definitely out there and getting more reasonable every day. MidwestPX has had a pretty steady supply of the NFA polymer lowers. I picked up 2 and was pleasantly surprised with their quality. I also saw a place sell Seekins (forged) the other day for $130 so if you're patient you will get one. The BCG is gonna be the biggest challenge to find. Try watching the BCG thread on AR15.com http://www.ar15.com/forums/t_3_4/595389_Bolt_Carriers.html&page=175

Good luck!

I'm just waiting on NICS for my lower actually. I got the polymer one from midwestpx. I just went today for the paperwork as soon as NICS check finishes I'm good to go. Yeah I'm surprised I got the lower and upper and the parts kit so quickly all within a week. And thanks to my bro for the charging handle I'll save some cash. Mags and ammo are another story.

Wait...

 

There is so much misinformation in this thread it is making my head hurt.

 

The barrel extension isnt what you guys are thinking it is. The barrel extension is the part on the barrel with the feed ramps cut in. It has nothing to do with adding length to the "front" end near the break.

 

http://www.m4carbine.net/showthread.php?t=193

 

An M4 barrel extension refers to what type of feedramps are cut into the breach.

HKHockey. Thanks for that like I said it's my first build so the more and accurate info I have the better. Looks like once I get the upper I'll head over to the guild and have them do the pinning and welding the are not far from me and haven't let me down yet.

I just re-read my post. Sorry if it sounded a bit snippish.

 

What brake have you decided on?