I have a Bushmaster "Shorty" which is the A2 version of it. I'd really like to get a flat top upper on my AR but I'm not sure if M4 uppers or other flat tops are interchangeable. I figure I'd be better off buying a stripped upper for a couple of hundred bucks instead of paying $800 + for a complete upper. Thanks for your help.
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Are A2 Uppers interchangeable with Flat Tops?
- Thread starter Ma$$hole
- Start date
In short ... yes. AR's are like lego's and as long as the parts are milspec you're good to go.
Only thing to note is that Colt used to use big front pins in their early lowers and you'll need an adaptor to fit a normal milspec upper to a big pin Colt lower or a big-pin Colt upper to a milspec lower.
Only thing to note is that Colt used to use big front pins in their early lowers and you'll need an adaptor to fit a normal milspec upper to a big pin Colt lower or a big-pin Colt upper to a milspec lower.
Or you'll need a Colt compatible upper like this one....
http://www.danieldefense.com/?page=shop/detail&product_id=19
-Mike
Who has flat top uppers for that price? I just finished my first lower and I'm in the market for one.
Romokid
NES Member
Try DSArms http://www.dsarms.com/Lowers--Uppers/products/59/. I had one of the nitride coated uppers on order, but canceled it because my "toy $" had to be used for something else.
Are there any disadvantages to using the offset pin?
In operation no but it's just a pain since it requires 2 screwdrivers to remove and the screw-on pin head can loosen up while firing. Loctite fixes that but then you need to put loctite on every time you remove the offset pin.
