2 Position Commercial Extension Tube???
Went to an estate sale over the weekend, only because there was a nice pile of AR-15 stuff. Bought a box of assorted parts and one intriguing item was a 2 position extension tube. I didn't measure it until I got home and it turned out to be a commercial tube with a non-angled back end and black in color. I have never seen a commercial 2 position tube and wonder about its origin (Bushmaster, DPMS, etc.)?
Any ideas?
Maj. USAR (Ret) 160th SOAR, 2/17 CAV
NRA Life Member
Black Mesa Ranch. Raising Fine Cattle and Horses in San Miguel County since 1879
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