MilSpec M4 Receiver Extensions?

[coooltom]

Does anyone know where I can find genuine MilSpec receiver extensions (buffer Tubes) for the M4? I ordered the Vltor rec ext from Brownells and was disappointed to see that they were the right demensions but made from extruded aluminum tubing, not milled! I am looking for the grey colored, milled aluminum, MilSpec Item. Thanks for any info!

[RMTactical]

http://www.bravocompanyusa.com/Milspec-Receiver-Extention-Buffer-Tube-p/milspec%20receiver%20extention.htm

[bdh_1]

Do you have the spec for the receiver extension? AFAIK the spec calls for forged or impact extruded 7075 aluminum. LMT also sells a 7075 milspec diameter extension.

http://www.m4carbine.net/showthread.php?t=18218

[Onmilo]

VLTOR is another producer.
http://www.vltor.com/accessory.htm