B.A.D. AR Buffer Tube Receiver Extension | 6 Position | Black

The B.A.D. AR Buffer Tube Receiver Extension in black, 6 position, delivers a durable, high quality foundation for adjustable AR-15 stocks. It is machined from 7075-T6 aluminum and finished with hard coat anodizing, giving it the strength, consistency, and correct dimensions required for reliable performance on AR15 and M16 carbine platforms. This is the mil spec carbine tube done properly, without the tolerance surprises that plague budget parts. Get this component right and everything mounted behind the receiver simply works.

Who Needs the B.A.D. AR Buffer Tube Receiver Extension

Anyone building an AR-15 from parts needs a receiver extension, and anyone replacing a worn or out of spec tube on an existing rifle needs a good one. Loose stocks, gritty adjustment, and stocks that will not slide are almost always a tube problem rather than a stock problem.

This one is built to true mil spec external dimensions, which ensures proper fitment with the vast majority of AR-15 carbine stocks on the market. If your stock says mil spec, this tube is what it was designed to slide over.

Features of This 6 Position Carbine Tube

The B.A.D. AR Buffer Tube specification list is short because the job is well defined.

• Mil-Spec 6 position carbine buffer tube for AR15 and M16 platforms
• Machined from strong 7075-T6 aluminum for durability under repeated cycling
• Hard coat anodized finish for enhanced wear resistance and corrosion protection
• True mil spec external dimensions for compatibility with mil spec carbine stocks
• Precision machining that keeps stock adjustment smooth across all six positions
• Compatible with mil spec carbine stocks and hardware

Specifications and Why Mil Spec Dimensions Matter

7075-T6 is the higher strength aluminum alloy in the AR world, noticeably stronger than 6061 and the standard choice for parts that see repeated impact loading. A buffer tube takes the buffer slamming rearward on every shot, so alloy selection is not a marketing detail here.

The mil spec versus commercial distinction comes down to external diameter and the way the tube is made. Mil spec tubes are slightly smaller in diameter and are threaded rather than rolled at the rear, which is why a commercial stock rattles on a mil spec tube and a mil spec stock will not fit a commercial one at all. Match your stock to the tube.

Six positions gives you length of pull adjustment across the range most shooters need, from short for armor and heavy clothing to full extension for a t shirt at the range. Browse more AR components in our parts and upgrades collection.

Installation, Setup, and Care

Clear the firearm and remove the old assembly first. Install the B.A.D. AR Buffer Tube with the buffer retainer and spring in place, being careful to keep the retainer captured as you thread the tube in, since it is the part most likely to launch across the room during an AR build.

Torque the castle nut properly and stake it. Staking is what keeps the castle nut from backing off under recoil, and an unstaked nut is the most common cause of a rifle that develops a loose stock a few hundred rounds later.

Pair the tube with the correct carbine buffer and action spring for your gas system and barrel length. Then function test with the ammunition you intend to run, checking for full lockback on an empty magazine and consistent ejection.

Maintenance is mostly cleaning. Wipe carbon from the interior where the buffer rides, keep sand and grit out, and inspect the threads at the receiver end during deep cleaning. Battle Arms Development parts hold their dimensions well over the long haul.

A correct foundation makes every stock feel better and every build come together faster. Ships direct to your door, no FFL required.