Best way to swap out longer barrel on AR15?

[Tutmos]

Perhaps I should have given this a different title. I'm a relative newbie so forgive my ignorance. I've currently got a Bushmaster AR15 M4, It sounded like a really nice idea to have a second upper and long barrel, 20 or 24" that I could quickly swap out if I decided I would like a more accurate long range gun or just better projectile velocity. The upper / longer barrel combinations from Bushmaster are about the same price as a complete gun. Is there a better way to go about this or a better source I should be looking to?

Thanks in advance.

[Fast351]

Rock River Arms has some very reasonably priced uppers. I've been very happy with their Wilson stainless barreled upper I have from them.

[onebohemian]

Check out DPMS or Brownell's websites. Both have numerous uppers that should fit.

[Rem700]

Brownells

Stock Number / Desc
Price
Your Price
Qty
More Info

231-000-199
.223/A2 Sight 20" Std Barrel $553.57
$442.86


231-000-200
.223/FT Sight 20" Std Barrel $535.71
$428.57


231-000-201
Barrel, 16", Std, A2 Pre Ban $543.34
$434.67


231-000-019
.223/FT Sight 16" Bull Barrel $545.00
$436.76


Gun Parts
231-000-020
.223/FT Sight 20" Bull Barrel $553.45
$442.67

[Pinnacle]

Just buy a complete upper.

[hammAR]

Be aware of the pins.................

[justaguy]

+1

[Rem700]

Or buy a used complete Bushmaster upper with a 20'' SS bull barrel and less then 50rds thru it $425

[Spartan117]

If you want accuracy, go for a noveske or something similar.

[Tutmos]

Or buy a used complete Bushmaster upper with a 20'' SS bull barrel and less then 50rds thru it $425

That sounds like a pretty good idea although I'd find it pretty hard to believe anyone only put 50 rounds through an AR15, a revolver maybe, but something with a 30+ round magazine?

[Rem700]

Nope only went to the range one time about enough to get a scope sighted in and a little bit of playing, Now some of the other toys have a few more rounds thru them besides ammo is getting expensive.

[Tutmos]

Feel free to send me some pics or post them here. Where are you located?

Edit: Duh I just noticed Blaine

[Rem700]

Speaking of Duh! When I went in and looked at the rifle I looked down and read Bushmaster on the side of the magwell the magwell is part of the lower The upper is actually a DPMS.
I will probably put up a couple of pics later anyway. Sorry

[Rem700]

Upper pics