The Ultimate Firearms Destination for the Gun Lifestyle

Mid-Length Gas System Better Than Carbine Length? NSWC-Crane Testing Suggests Yes

At RECOIL, we review every product fairly and without bias. Making a purchase through one of our links may earn us a small commission, and helps support independent gun reviews. Learn More

Soldier Systems Daily released its in-depth analysis of NSWC-Crane's mid-length gas system study briefing, proving there is still more to learn and officially accept about the AR platform.

Flashback: Last year Crane's findings on M-LOK vs. KeyMod were made public detailing not only the testing process but also the multiple failures of the KeyMod system. Since that report was made public KeyMod seems to have fallen out of favor with M-LOK growing in popularity faster than ever.

Is there a possibility that the market may react to this Crane test in much the same way?


Mid-Length configured uppers are being tested in these areas by Crane:

  • Endurance
  • Reliability
  • Precision
  • Muzzle Velocity
  • Terminal Velocity (@100 yards)
  • Bolt Speed
  • Low Temperature (-60F)
  • High Temperature (160F)
  • Barrel Erosion

Here is an excerpt from Soldier Systems' post:

So far, Crane has put 30,400 rounds of M855A1 through three M4A1s equipped with 14.5″ cold hammer forged barrels and a mid-gas system with a gas block approximately 9.8″ from the bolt face.

They stated SOF M4A1s normally start to see accuracy degradation at around 6,000 rounds. But during testing of the mid-gas system, they’d hit 12,600 and still hadn’t seen any changes.

To read the rest of the post about Crane's testing, head on over to Soldier Systems Daily to see it in full.

Thanks to Mrgunsngear for the cover photo.

Enter Your E-Mail to Receieve a Free 50-Target Pack from RECOIL!

NEXT STEP: Download Your Free Target Pack from RECOIL

For years, RECOIL magazine has treated its readers to a full-size (sometimes full color!) shooting target tucked into each big issue. Now we've compiled over 50 of our most popular targets into this one digital PDF download. From handgun drills to AR-15 practice, these 50+ targets have you covered. Print off as many as you like (ammo not included).

Get your pack of 50 Print-at-Home targets when you subscribe to the RECOIL email newsletter. We'll send you weekly updates on guns, gear, industry news, and special offers from leading manufacturers - your guide to the firearms lifestyle.

You want this. Trust Us.

Add a comment

Your email address will not be published. Required fields are marked *

Subscribe to the Free