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Tools, the eight steps to swap a standard AR-15 trigger, how drop-in triggers differ, the function check you must do afterwards, and the mistakes …

Torque values for the barrel nut, castle nut, muzzle device, gas key and the small screws, with the units that trip people up and …

The muzzle thread for every common AR-15 and AR-10 caliber, what the numbers mean, and how to check your barrel before you buy a …

Buying a scope doesn't have to be tough. Once you know what to look for, you can narrow down your choices to what best …

Six AR-15 red dots that were in stock at several stores, each picked for a different job, with the maker specs that matter: reticle, …

Everything you need to build an AR-15: parts list with current prices, tools, and step-by-step photos for the lower and upper receiver.

Ever wondered how people got PMAGs in crazy colors that you can't seem to find on the Magpul site? We will show you how …

How AR-15 trigger types differ, and seven in-stock triggers picked by job: duty, drop-in, two-stage, adjustable and binary.