Clone AR15 Lower Receiver - Government Property GM Hydramatic

SKU 101-0505-022

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Clone / Tribute AR15 Lower Receiver - GM Hydramatic Clone

We engrave these lowers as close as we can get to the originals.  The originals were roll marked which leaves a different appearance, but we work hard to reproduce the engravings as accurately as possible.  These lowers are machined from modern 7075-T6 forgings and will not always accurately replicate the forging style of the original. 

  • CNC Machined from a 7075-T6 forging
  • Hard coat anodized
  • M4 style fire control group pocket machined to current government prints
  • Manufacturer markings are underneath the trigger guard
  • Model:  M16A1
  • Manufacturer:  Bad Attitude Department
  • Caliber: 5.56MM
  • Manufactured right here at the Bad Attitude Department

Note:  We mill the lug pockets for the upper receiver at the very bottom of the specification.  If your upper is at the top of the specification, you will have a snug fit.  If it is out of spec on the high side, you may have to stone the sides of your upper receiver lugs to fit.  This is a feature, not a bug. 

This is considered by the ATF to be a firearm and must be shipped to an FFL for transfer to you. These cannot ship directly to your residence. Please be aware that because these are not long guns, you must be 21 to take possession of them at your dealer. Returns due to failed transfers will be accepted with a 15% fee and return shipping covered by the customer. Customized lowers cannot be returned for any reason other than manufacturing defect. Any transfer fees charged by the transferring dealer are the responsibility of the purchaser.

We must have a copy of your dealer's FFL prior to shipment. Either you or your FFL may email it to We do not have a fax machine.

Product Reviews

Score: 4 out of 5 (based on 1 rating)
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Great Throwback Build Starter
Written by Tim on 15th Dec 2023

Having been issued a GM Hydramatic in the Army, and having family members who worked for GM, this was a must have build for me. Love the markings and overall its a quality lower. BAD's discrete markings in the trigger well keep the GM aesthetic intact. The only ding I can give is the A2 profile on what would have been an A1 profile lower. Some guys are more OCD about that than me. I'd rather it be A1 but its still going to make for a great build that will end up pretty darn close to one of my issued rifles. The price was extremely reasonable too so that makes it easier too overlook the A2 profile.