05-29-2018, 10:31 PM
The most important factors here are:
* 18" MLGS
* Suppressed
Cartridge comes after that. Run a 5.56 NATO 18" MLGS suppressed and see what happens.
SOCOM has experienced early parts failure for many years now due to suppressed use and gas systems that weren't meant to be suppressed.
The problem is that the bolt is under thrust when the increased cyclic rate forces the carrier to the rear, and now you have torsion on the lugs as well, with additional back-pressure.
First things to go are:
Extractors
Bolts
This is why SOCOM solicited the industry to make the Suppressed Upper Receiver Group for the M4A1 SOPMOD Block upgrade program. Instead of replacing parts all the time, they're dealing with it by spec'ing out a complete, integrally suppressed upper that is meant to run suppressed all the time.
Flow-through suppressor designs have been doing better with mitigation of cyclic rate and back pressure, allowing the cans to vent forward, rather than acting like accumulators.
If you look at the SPR, they ended up going with RLGS on an 18" .223 Wylde for this reason, so the plug dwell time would be minimal.
If I were shooting 6.5 Grendel suppressed with an 18" barrel, I would want RLGS or ILGS and an adjustable carrier for conventional can, or flow-though suppressor.
I'll be using my TBAC Ultra5 -30 5" can on my 12" CLGS Grendel, which will act more like a 14.5" CLGS Grendel-totally fine with the correct port and gas pressure into the action.
When you add what acts like barrel length to an already excessive plug dwell arrangement of the 18" MLGS, it's going to be very hard on the bolt with rotational torsion.
* 18" MLGS
* Suppressed
Cartridge comes after that. Run a 5.56 NATO 18" MLGS suppressed and see what happens.
SOCOM has experienced early parts failure for many years now due to suppressed use and gas systems that weren't meant to be suppressed.
The problem is that the bolt is under thrust when the increased cyclic rate forces the carrier to the rear, and now you have torsion on the lugs as well, with additional back-pressure.
First things to go are:
Extractors
Bolts
This is why SOCOM solicited the industry to make the Suppressed Upper Receiver Group for the M4A1 SOPMOD Block upgrade program. Instead of replacing parts all the time, they're dealing with it by spec'ing out a complete, integrally suppressed upper that is meant to run suppressed all the time.
Flow-through suppressor designs have been doing better with mitigation of cyclic rate and back pressure, allowing the cans to vent forward, rather than acting like accumulators.
If you look at the SPR, they ended up going with RLGS on an 18" .223 Wylde for this reason, so the plug dwell time would be minimal.
If I were shooting 6.5 Grendel suppressed with an 18" barrel, I would want RLGS or ILGS and an adjustable carrier for conventional can, or flow-though suppressor.
I'll be using my TBAC Ultra5 -30 5" can on my 12" CLGS Grendel, which will act more like a 14.5" CLGS Grendel-totally fine with the correct port and gas pressure into the action.
When you add what acts like barrel length to an already excessive plug dwell arrangement of the 18" MLGS, it's going to be very hard on the bolt with rotational torsion.
NRA Basic, Pistol, Rifle, Shotgun, RSO
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com