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17,533 Posts
I have one for my AR's and a buddy has the M16 version to run his M16 full auto on 22LR,I have 0 problems with shooting 223 afterwards,the shots aren't as accurate as a dedicated 22 upper,but they are fairly accurate and fun to shoot and save a lot of money,you can shoot about 15 shots 22LR for 1 shot of 223.Mine likes the federal bulk box 550 round ammo and they like a lot of lube on the bolt slide rails.It is cycled by blowback instead of gas so I've never had my gas tube get crudded up.You can get black dog 30 or 26 round replacement mags cheaper than buying the other ones,try JSE surplus and look at their magazines