Home AR-15 The Ultimate Backpack AR-15

The Ultimate Backpack AR-15

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In this video, Caleb from Brownells walks through the full build of what he calls the Ultimate Backpack Gun for 2025. Designed around the Law Tactical AR Internal Carrier (ARIC) and the new Law Wrap 1913 adapter, this compact AR setup is perfect for discreet transport and quick deployment. Follow along as Caleb assembles the full rifle step-by-step, from lower to upper, and explains each component choice along the way.

Chapters
00:00 – Introduction and Concept
00:47 – Law Tactical ARIC and Wrap System Overview
02:06 – Lower Receiver Selection and Setup
03:20 – Trigger and Safety Install
05:01 – Greasing and Assembly Tips
08:05 – Ambidextrous Selector Setup
09:33 – Grip Installation and Detent Greasing
11:17 – Selector Lever Pin Installation
12:03 – Installing the Law Wrap Adapter
14:10 – Takedown Pin and Spring Fitment
16:52 – Proper Torque for Wrap Flange
17:58 – Set Screw Installation Warning
19:17 – Reinstalling the Rear Plate and Function Check
20:11 – Upper Receiver and Barrel Setup Begins
21:29 – Brownells Lightweight Barrel Specs

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36 COMMENTS

  1. Anyone think I can fit a standard 14.5 rifle with a A2 muzzle device in that bag if I separate the upper and lower? Caleb has the silencer and the additional length from the folder

  2. You guys could do a whole series on just packs/bags. I know it's not REALLY you guys' thing, but a series of different bags and packs showing what fits in them, what doesn't, how they're laid out, different little add-ons and stuff, different use cases, etc?…I'd watch the hell out of it. It's completely unexplainable and weird but I love bags/packs…

  3. Nice SBR. One option is to add an adjustable gas block that allows the gas to go forward and or even the same with a piston version. IMHO. Thanks! P.S. because you're a lefty why not use a left eject upper?

  4. Cool build, but would be even better with the light tucked even closer (modlight button)

    If you mounted the light on the opposite side, would result in a slimmer build since its same side as the folded stock. Then use a slick upper (no fwd assist) to cut down on bulk sticking out ejection port side

  5. Caleb…why use an AR wrench and not a 3/8" rachet to install the threaded flange? You had the armorer's tool, which has a 3/8" square on the end…. That's 5 minutes I'll never get back… 🤯

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