AR Sponsor
Posted: 3/23/2010 7:49:18 PM EDT
| Are all Mil Spec receiver extensions the same? I know the diameter is different from the commercial sized tubes, but is there any diiference between the Mil Spec's themselves? I was particulary curious about the DSA tubes for $20 at Aim. I think that I read that they were made from an extrusion. Is that different from how the Colt and/or BCM tubes are made? |
| I think the DSA ones for around $20 are 6061. Original mil-spec I believe is supposed to be 7075, which is harder than 6061. Other than material and a perhaps a few dimensional differences (length of threads at front & amount of chamfer at rear), I don't know what makes a Vltor tube cost $45. |
| The only differences I can think of I've seen are material, finish as in type of annodising, number of positions (4, 5, 6) and the finish of the inside. Some makers don't smooth out the inside of the tube nearly as much as others, so they are noisier and rougher feeling when you pull the bolt to the rear. |
|
Quoted:
., but is there any diiference between the Mil Spec's themselves? . Yes there are some differences. Note there is a difference between a receiver extension made to the mil-spec and one that is 'mil-spec' diameter. Some differences are not important (like number of detents, numbering the detents, or logos on the aft size). The potentially important differences (materials, methods, and finishes) are not readily apparent to the eye. |
|
Quoted:
Quoted:
., but is there any diiference between the Mil Spec's themselves? . Yes there are some differences. Note there is a difference between a receiver extension made to the mil-spec and one that is 'mil-spec' diameter. Some differences are not important (like number of detents, numbering the detents, or logos on the aft size). The potentially important differences (materials, methods, and finishes) are not readily apparent to the eye. This, you get what you pay for. |
AR Sponsor