7.92x33 AR Pistol is ALIVE!

CarJunkieLS1 · October 24, 2019, 08:37 PM

For several months now myself and a friend has been sourcing parts and putting together, we believe to be the only 7.92x33 AR pistol in existence. Well a few days ago the barrel work was finished by my friend so today we put it all together and got to testing. Well IT WORKS.

Factory PPU 124fmj ammo cycled and locked bolt on empty mag. It was anemic at 2180fps. Tested 3 powders today CFE BLK, A1680, and Lil Gun. Load data is very hard or in most cases impossible to find, so some smart educated guesses were made and with help of Quickload we got off and running.

The barrel is 12 3/4 inches and all testing was done with New Primed PPU brass and Hornady 125gr HP.

The following data may or may not be published data USE AT OWN RISK.

28.3 CFE BLK 2304fps
22.5 Lil Gun 2417
28.5 A1680 2485

CFE BLK cycled, fed, and locked open.

Lil Gun had weak ejection, did feed another round, and failed to lock open.

A1680 cycled, fed 4 o'clock ejection but failed to lock open. A1680 is the winner so far but will take some gas port tweaks to get it to lock open.

armoredman · October 25, 2019, 04:14 AM

Oh, you gotta do photos!What are you using for mags, STG44 mags? This IS the same round as the STG44, correct?

CarJunkieLS1 · October 25, 2019, 06:53 AM

Yes same round as STG44 and I am not using STG mags either. The mags are common mags that have been extensively modified to reliably feed and function. My friend came up with the mag design and I've been sworn to secrecy how it's been done.

doofus47 · October 25, 2019, 04:27 PM

Love the ingenuity.

October 24, 2019, 08:37 PM	#1
CarJunkieLS1 Senior Member Join Date: October 1, 2013 Posts: 686	7.92x33 AR Pistol is ALIVE! For several months now myself and a friend has been sourcing parts and putting together, we believe to be the only 7.92x33 AR pistol in existence. Well a few days ago the barrel work was finished by my friend so today we put it all together and got to testing. Well IT WORKS. Factory PPU 124fmj ammo cycled and locked bolt on empty mag. It was anemic at 2180fps. Tested 3 powders today CFE BLK, A1680, and Lil Gun. Load data is very hard or in most cases impossible to find, so some smart educated guesses were made and with help of Quickload we got off and running. The barrel is 12 3/4 inches and all testing was done with New Primed PPU brass and Hornady 125gr HP. The following data may or may not be published data USE AT OWN RISK. 28.3 CFE BLK 2304fps 22.5 Lil Gun 2417 28.5 A1680 2485 CFE BLK cycled, fed, and locked open. Lil Gun had weak ejection, did feed another round, and failed to lock open. A1680 cycled, fed 4 o'clock ejection but failed to lock open. A1680 is the winner so far but will take some gas port tweaks to get it to lock open.

October 25, 2019, 04:27 PM	#4
doofus47 Senior Member Join Date: June 9, 2010 Location: live in a in a house when i'm not in a tent Posts: 2,483	Love the ingenuity. __________________ I'm right about the metric system 3/4 of the time.

October 25, 2019, 04:14 AM	#2
armoredman Senior Member Join Date: May 22, 2007 Location: Arizona Posts: 5,299	Oh, you gotta do photos!What are you using for mags, STG44 mags? This IS the same round as the STG44, correct?

October 25, 2019, 06:53 AM	#3
CarJunkieLS1 Senior Member Join Date: October 1, 2013 Posts: 686	Yes same round as STG44 and I am not using STG mags either. The mags are common mags that have been extensively modified to reliably feed and function. My friend came up with the mag design and I've been sworn to secrecy how it's been done.