Topic: DPMS 308 SASS Barrel and Gas Block Issue (Read 5001 times)

TacBlade · « **Reply #30 on:** January 18, 2011, 07:18:11 PM »

I have that JPVTAC on my build, as you have seen. I must have the new upper receiver, as the rail that is mounted on top of the tube is just slightly lower than the rail on the upper receiver?

imschur · « **Reply #31 on:** January 18, 2011, 07:20:22 PM »

correct

survivalshop · « **Reply #32 on:** January 19, 2011, 11:15:56 AM »

Quote from: TacBlade on January 18, 2011, 07:18:11 PM

I have that JPVTAC on my build, as you have seen. I must have the new upper receiver, as the rail that is mounted on top of the tube is just slightly lower than the rail on the upper receiver?

I think they lowered the one on the newer DPMS upper receiver & the hand guard rail should be higher than the receiver rail.

Did you put the lower rail height on the VTac?

They make two Heights .1/4 & 3/8 ,I believe.

I got my rail for my VTac from Brownells.

TacBlade · « **Reply #33 on:** January 19, 2011, 01:44:13 PM »

I bought the handguard used, but the rail on the handguard is lower than the rail on the upper receiver.

JMoto · « **Reply #34 on:** July 16, 2011, 02:14:14 PM »

MAJOR UPDATE

JP enterprises JPGS-8 adjustable gas block DOES fit the SASS barrel. At the very edge of the shoulder the gas tube hits for .03 in. I took a fine file and remove .002 which appeared to simply be the park on the barrel and hit it with some bluing i had laying around. It will fit under the JP tube, but not the sass factory tube. A lot of folks looked at pictures and said that it will not work. I ordered it and tried it to see for myself.

imschur · « **Reply #35 on:** July 16, 2011, 08:04:22 PM »

Did you take a picture for us?

JMoto · « **Reply #36 on:** July 16, 2011, 08:43:41 PM »

Quote from: imschur on July 16, 2011, 08:04:22 PM

Did you take a picture for us?

I do but that camera died in the midst of transferring the pics. When I find the charger I will post them. Would you like them here or in a separate thread?

imschur · « **Reply #37 on:** July 16, 2011, 08:57:16 PM »

Here is fine for now. Thanks!

Shaggy · « **Reply #38 on:** November 17, 2011, 04:01:26 PM »

Anyone try making the SASS GB adjustable?

Here is my plan:
Drill a hole through the gas block (either on the side or the front) to the gas port between the gas tub & barrel. Tap the hole & insert a set screw.

I'm pretty cheap, so I try jerry-rigging stuff first. Sometimes it ends up costing me in the long run though.

Jgun · « **Reply #39 on:** November 17, 2011, 05:02:27 PM »

What your describing is exactly what PRI does with their lowpro adjustable gas block, so I don't see why it wouldn't work. They tell you to adjust it and then locktite the set screw in place once you've found the correct adjustment. For added security, I milled a small flat around the screw hole and installed a longer set screw with a nut that I can tighten against the side of the GB to keep the screw from moving, so far it's still there.

Jgun · « **Reply #40 on:** April 30, 2012, 06:35:12 PM »

I know this is an old thread, but I don't see that an answer was ever posted as to the difference between the PRI .936 gas block and the DPMS SASS gas block measurement. I see that Doc posted that the DPMS has .125" space betwwen the two bores, If it's of use to anyone, the space between the .936 bore and the gas tube bore on the PRI is .065"