yup, mount the clone on the receiver as it will shift POI if the rail slips any or wiggles. You should take the can plunge now before prices and wait times go up if the election goes the wrong way. a Gemtech Trek 5.56 works great on the .22 and any other threaded AR, double duty, runs about $500 plus the $200 donation to the NFA. or you could go for a take apart dedicated .22 can for around $275. Wait times are down now to about 4 months due to them hiring some strictly background investigators (bout time) so that the 9 ATF examiners for the whole country has some help. I have another in the line which i think will be here early December. go the Trust route with Quicken Willmaker premium plus trust maker, about $20 on Amazon. Have found that it is still first come, first served when it comes to the order you paperwork goes in the NFA line, but the trust is faster go get approved due to no background, prints, photo's, CLEO sig, etc. JMHO