$125 plus $5 shipping(Lower 48)....I am in Tucson AZ
Paypal ok +3% or Money order
Price dropped from $150 to $125
Compare to the last one sold on Gunbroker:
Army M261 .22 caliber conversion for AR-15, and M16 rifles. Some blueing wear, but works fine. Includes 2-10 magazine inserts, that simply push into the regular magazines.
I got this used and ran less then 100 rounds through it, no idea on the round count. Once you get the mag insert aligned into a 20 round mag these cycled for me w/o issue.
Mag inserts work best in 20 round mags, but will work in 30 round mags.
Link to the Manual.www.txmarks.org/cdfiles/Individual%20Weapons/TM%20M-16%2022LR%20Adapter.pdf