Don’t know nuttin’ ‘bout them new fangled AR critters but on other stuff I have used 5w-20 Mobil One synthetic oil sometimes.
Like other guys said Ballistol is a real good lube too.
I use Mobil 1 exclusively on all my ARs and handguns (Or did, before the unfortunate boating accident where all were lost, of course)...
Some excellent write ups on the ‘Net...Just search “Mobil 1 For Guns”...Mobil 1 rates tops in every category for which oils are evaluated, reduce friction, barrier, corrosion, cleaning, viscosity, heat breakdown, etc...Costs $6 a quart versus $10/4 oz for the gee-whiz, fancy stuff...
And a fair substitute for a CLP-like product can be homemade by mixing white lithium grease with Mobil 1 in about 1:10 to 1:20 ratio by volume...Just mix and shake...Shake well before using...Use sparingly...YMMV...